And I am saying that we should use both of those in concert to supplement each other. And that, in this case
Agreed.
My issue is that there are strict diminishing returns at our level, and there are lots of things for us to spread our attention across.
You are arguing that "if it didn't show up on screen in canon, it can't exist". Which is, I have to say, strange.
No.
I am saying that if it didn't show up on screen in canon, it either doesn't exist or has been tried and found to be non-effective.
That we aren't suddenly breaking paradigms by think of wire training and spinning balls.
Shinobi aren't stupid, and the Great Villages, as well as the clans that formed them, have at least a sixty year history, with decades of general warfare before that. The brutal Darwinism of constant warfare would have grabbed all the low-hanging fruit and killed off people who weren't optimizing for efficiency.
There may be room for improvement, but we are not going to improve on that with a genin months out of the Academy.
People do not grind control for the sake of control in canon; not above the level of Water Walking.
When Jiraiya was teaching Naruto Rasengan, he didn't simply heap him down with isolated control exercises beforehand.
Also see how Naruto did not develop better control over the Rasenshuriken until he actually learned other techniques altogether, that required improved control.
And OOC, trying to represent improved control mechanically introduces an additional layer of complexity for the GM to manage.
Which is not a good thing for Quest longevity.
I am talking about rotating a magnet on its axis with chakra.
*sigh*
So? Why does it means that what I am proposing won't work?
Because the rules are patently different here.
Don't assume they don't, until we have reason to believe so. The world we see is similar to our own in how it looks and behaves outside of magic. SO, yes, I'll assume that it works the same way ours does until given evidence that it doesn't. Otherwise, any planning at all is impossible.
Not really, no.
Creation of All Things is explicitly a base technique that was employed in this universe; chakra was imported and implanted in humans.
Extraterrestrial/extradimensional aliens who can interbreed with humans are also a thing here. There is an actual death god who can be summoned.
Magic was retrofitted into the workings of this world by intelligent beings.
You cannot treat RL as a proxy simulation of it.