How you got the idea that teleportation = simple intergalactic travel I will never know.
Simple, it's mostly due to a phenomena in conversation called "generalization". To be more specific, teleportation makes intergalactic travel
relatively simple. Better now? But to expound on that: The major problem with space travel, - and that's just travel within nearby solar systems - is distance. Not only are the distances greater than people realize, but do to the expansion rate of the universe, the distances get farther
every single day. Worse, how much farther the distances grow is exponentially larger the farther apart they already are. So yes, while teleportation doesn't make intergalactic travel as easy as walking down the street, it
does make intergalactic travel, and even mere inter-system travel, much, much,
much easier. By nature of what teleportation means. Travel from one point to another without crossing the distance between. Go see any talk by physicists about space exploration. Distance is our largest problem. I'd suggest Lawrence Krauss or Neil Degrasse Tyson. They're easier to listen to than most due to their skill as orators.
I can't of the top of my head find any sci-fi franchise where there was long range teleportation (teleporting outside the star system) with intergalactic travel by technological means. The only thing I can think is the interstellar teleportation platforms in the Dahak series by Dawid Weber that lead to the destruction of the human Empire by way of biological weapon. But there was no instant intergalactic travel there. As for the gigantic Ori stargate (and other intergalactic stargate connections) in the Stargate franchise that was using wormhole technology and nothing about teleportation. Except for the Destiny every intergalactic ship (I'm not counting Atlantis experimental drive) used hyperspace drive which put the ship into another dimension where the rules of physics were different enough that without proper shielding/armouring the ship would be destroyed. And Worm or Nanoha which are the settings used in this quest don't say one way or another how ftl works here.
This is a rather large bit of nonsensical points as they have no bearing on anything I actually put forward. While MGLN certainly is a fantasy world, just because some random TV shows didn't use teleportation doesn't make it not viable. Hyperspace, Wormholes, etc are various methods of cheating the distance problem, and were seen as "more realistic" than teleportation, mostly because we didn't think we'd be able to do it, and also due to the very human way of thinking "more distance means harder" even if when it comes to actual teleportation (rather than some facsimile of it) that wouldn't actually be true. Travelling through hyperspace is faster than travelling through real space, but it is still not as fast as teleportation. Wormholes like in Stargate are a way of simulating teleportation. Similar result but from a different effect.
Wormholes are us tearing through space, to bring two distant points together so we can take a single step to go from one to another. Vista's power is like that of wormholes. (But not, again similar result from a different effect.) She bends space, to make the distances between locations larger or smaller. Wormholes aren't exactly like that, as they actually tear
through space, giving you a "tunnel" or a "hole" to step through that puts you out on the other end in your chosen location, but the result is similar. Teleportation is disappearing from one place and appearing in another. Right there we have three different methods of having the same result. One doesn't invalidate the other. You can get the same result by following different paths.
That leads us to Nanoha and Worm. In Worm we have multiple instances of powers crossing dimensions (Doormaker, the connection to Earth Aleph) but the entities didn't give out space/ftl flight powers for travel inside the same dimension (can't remember if Legend's power being Eden's interstellat drive was canon or fanon but even there travel wasn't instantaneous). Also if I'm not wrong the reason why the Entities destroyed the planet wasn't out of spite or to "clean up" but to use the destruction to power themselves in travel to another location. Most theories (and "science" in sci-fi franchises) about FTL travel propose that it should be cheaper to get out of this dimension where the light speed limit is imposed and travel through another where either it's different or where the relative distances are lower than our own. In Nanoha that outside dimension is the Dimensional Sea. Most long range "teleportation" is about travelling through the Dimensional Sea with magic and not about deconstructing/reconstructing the mage after teleporting the pieces like in Star Trek. If we assume that TSAB is multidimensional and not just using the Dimensional Sea to travel between planets in the same dimension (since I can't remember seeing a map anywhere in the show) then they most likely have discovered a way to use the Dimensional Sea to travel to other dimensions before getting to other galaxies (if they even managed as one the TSAB is fairly young and two from the numbering of planets in the show the number of unadministered worlds shouldn't have left 3 digits. And that number is A LOT smaller than the
proposed number of habitable planets in our galaxy. So there is no way TSAB is intergalactic anyway.
Here you finally have a good, relevant point. I was not aware that MGLN "teleportation" was actually them using other realities where the laws of physics were different so that they could travel FTL. (Well, technically they wouldn't actually be travelling FTL. They would be travelling at the max speed of THAT reality, which is higher than FTL in THIS reality, but is not higher than FTL in their current reality... which just gets things more detailed than necessary for no real purpose. Hence why I tend to generalize until shown that I need to expound upon a particular point.) That changes things drastically to be sure. I'm not big on MGLN lore, but this I blame on them using incorrect terminology, because that for damn sure isn't actual teleportation.
But you make a claim here that I find rather interesting. "...the number of unadministered worlds shouldn't have left 3 digits." Really? We know the upper limit of their numbered worlds? Did we ever have an episode where they found a
new unadministered world and gave it a number? Or where they said how many unadministered worlds there are? I am both making a point
and honestly asking. Because if you are assuming this from "Unadministered Planet #97" then that is also faulty logic. TSAB didn't just discover MGLN's earth. They'd been there before if I recall. Which would mean that we have no idea how many more numbered worlds they have.
On your other point: "Also if I'm not wrong the reason why the Entities destroyed the planet wasn't out of spite or to "clean up" but to use the destruction to power themselves in travel to another location."
This is true, however you fail to take their properties into consideration. The entites are multi-dimensional beings. Since they exist in multiple universes at one time, they can't "merely" go to an alternate universe where the laws are different and travel faster. They exist on a higher order and would have to travel through that higher order of physics. Shortcuts available to use due to being in a lesser state of existence are not possible for them. Not so long as they maintain their ridiculous mass, as apparently when they were smaller they didn't have to exist this way. But unfortunately, they aren't imaginative enough to think this through as shown in canon by them needing their hosts to figure out better ways to use their abilities.
As for your tactics. Which is the wrong term here as tactics are used when the battle is started. The correct term for planning your expansion and long term defence is strategy. You are first thinking in terms of 3 dimensional travel when we have a lot more dimensions here. And your analogy of a state in every country is also wrong. If in terms of ship travel time and energy spent it is cheaper/"closer" to acquire a planet in a different dimension then you acquire that planet and don't spend extra time/energy/money to search for planets in your own dimension that are "closer" but cost more energy to get to. If it's cheaper to travel to the same physical spot in another dimension then you most likely have a habitable planet right where you exit unless there are a lot of differences between dimensions. If it takes an hour to get to the "nearest" planet in another dimension but a day to the nearest habitable planet in the same dimension no planner would chose planet in the same dimension to expand to. And your argument about interrupting or blocking a travel method counts for a lot of in dimension FTL travel types. Interdictors from Star Wars as one example. So it's not only about travel between dimensions. In Nanoha the planet Belka is lost not because it blew up (probably as it's fate is unknown) but because of a dimensional dislocation and no one can find it now. And as the only FTL travel method is the Dimensional Sea in Nanoha that I know of then blocking access through it will block the relief forces no matter if the planets are in the same dimension or different ones.
The difference between strategy and tactics is a subtle one, yes. But I was using layman's terms which uses the words interchangeably. I tend to do that when not using scientific terms or otherwise technical terminology because frankly it only tends to matter when speaking scientifically or technically. Everyone knew what I meant when I said tactics. You're just being a "Grammar Nazi" which is rather ironic when considering the fact that you have multiple grammatical errors yourself.
As for the metaphor being wrong, you misunderstood my point entirely. To be fair, I didn't explain it in depth. I'll correct that here.
We have an Earth. One this earth we have a "country" that has a "state" on every continent. They can travel via air or sea. Not land because oceans. This country gets into a war. Their air travel is blocked by their neighbors having stronger air power, their sea travel is blocked for the enemy having stronger sea power. This country does have superior tanks and other land weaponry however. Unfortunately, their land capabilities are irrelevant, as they are surrounded on all sides, unable to reinforce themselves due to not having any significant connected territories. So, while their land power is superior, eventually sheer numbers overwhelms them as they are unable to gain reinforcements and they are defeated.
Similarly, if you only have one world ruled in many dimensions, if your dimensional transport is somehow disabled, you cannot reinforce yourself and the enemy may be better at interplanetary warfare than you. While that may be acceptable risk for your outposts, your main home planet can't have such a ridiculous risk, nor can your other major worlds. Minor worlds are disposable. Major worlds with unique resources, or high society rich people, or other things that require "protection" need to be secured from such a devastating event.
If on the other hand, you own at least a few worlds in every dimension that you have a major presence, even if your inter-dimensional travel is cut off somehow, you still can gather resources and reinforce lone worlds with normal teleportation or space-faring technology. It helps with protecting from isolation in such a situation.
Is this perfect? No, of course not. No defense is perfect. However it will allow your inter-dimensionally spread worlds to buy time while you try to figure out how your inter-dimensional travel has been blocked. Much like cities & castles with water sources could last longer than those without when awaiting reinforcements in land engagements. It isn't about ease of travel. It is about security.
Also in terms of safety interdimensional > intergalactic as in worst case scenario there could be an event that destroys the galaxy/multiple nearby galaxies/entire dimension that won't happen in other dimensions unless it can propagate by a constantly open interdimensional connection.
Yes, in certain instances interdimensional can trump intergalactic. But that depends on the threat you are facing. It is like rock paper scissors. Just because paper beats rock, that doesn't mean that paper beats scissors. You need the right defense for the right threat. You are making the classic mistake of being the guy with only a hammer who sees every problem as a nail. Sometimes you might want a set of pliers instead.
I would have ignored the interdimensional/intergalactic if Lunasmeow didn't combine his non canon theories with wrong terminology (tactics). I'm a fan of military sci-fi (Dawid Weber, John Ringo, David Drake, etc.) and certain things set me of.
Three things on this one:
1. It isn't a non-canon theory, as I never said that this was a belief, just that it would be strange if they weren't intergalactic (although I was actually thinking inter-system, and used the wrong term at the time, it doesn't truly matter because it is the same difference in the end just larger scale). I didn't assert that they weren't merely intergalactic, I just stated that such would be a rather strange thing.
Considering that many authors do things strangely (I can't stand seeing military misrepresented in film, and it so often is) because they don't always do their homework - I wasn't saying that they
couldn't be merely interdimensional without being intergalactic, just that assuming such on a logical basis without reason was strange.
2. Being a fan of military sci-fi has absolutely nothing to do with the points I raised. Unless you just strangely assume that every sci-fi show is "Truth In Television" or that all possible solutions to a problem just must have been addressed in popular TV shows?
Generally sci-fi has a few basic principles represented, but then those get expanded on in ways that don't actually work. Mostly because authors aren't usually scientists, so they can only go on the basic layman's terms used by scientists to try and explain things to people without the relevant knowledge to understand it.
Because scientists rely on funding from those who
aren't scientists, they have to explain why their research is important to people who are incapable of understanding it on a fundamental level. So scientists use metaphors a lot, and unfortunately metaphors while useful for conveying basic ideas, are not perfect. Much of the
details get lost in translation. Unfortunately people love to overestimate their ability to understand what scientists understand, and assume that they have the entire picture from a really "dumbed down" metaphor rather than the actual physics. They then go and make movies and books. Thus using sci-fi as a reason for anything realistic (in terms of something more than a general idea) is... not a good foot to stand on. TV land /= reality.
3. I'm all for dropping it if you are, but generally if a person suggests dropping something they shouldn't make their arguments right before that. It gives the impression of one trying to just get the last word before they can be countered while trying to give the
appearance of being the gracious one, when they really just aren't willing to have their statements questioned/debunked/debated. Similarly with falsely using an authority's name to try and end things, as if you were said authority.
Neither of these may have been your actual intent, but it is a very common debate tactic that is often used when people can't or won't back up their positions. That you invoked this right after someone pointed out another flaw in your reasoning is why I point this out. Perception doesn't
always equal reality (despite many people thinking so) but it often does at least to some extent have a good grounding in it.
. I would have ignored the interdimensional/intergalactic if Lunasmeow didn't combine his non canon theories with wrong terminology (tactics). I'm a fan of military sci-fi (Dawid Weber, John Ringo, David Drake, etc.) and certain things set me of. Sorry for helping with the quest derail as the discussion has nothing on our quest as unless we visit a TSAB world before the quest victory condition (taking out the Endbringers) how TSAB worlds are organised doesn't impact us.
