I think I will belabor this point a bit here, just to drive this home.
First off, you have to get from Creation to Hell. This is not a trivial undertaking unless you are an Infernal Exalt. You have to first find a place of desolation which can take anywhere from hours to years of travel depending on where you are in Creation when you get this Demon Saving Impulse (easier in the South, much much harder in the verdant East).
Second, you have to stumble across a path into Cecelyne. This is not as easy as it sounds. It can takes years of wandering the desert before you start finding the path into the Silver Sands.
Then its five days of grueling travel across a Mad Max style hellscape, harried by the harshest conditions in the setting as well as massive sandstorms, demonic raiders, honeytrap style oases of supposed safety and heaven help you if Cecelyne herself somehow figures out what you are up to and decides to take personal issue with it.
Now you arrive in Malfeas, which is fucking huge even in the smallest interpretations acceptable to some people here. There is no gaurantee, by the way, that you arrive anywhere near where you wanted to show up. As a first time immigrant you will be dropped at an essentially random point on a random layer of hell just outside the walls of Malfeas. Now you have to go and find an impending layer collision, which can take anywhere from a few minutes to a few thousand years of searching to actually come across depending on how big your version of Malfeas is and how close you are to the next impending catastrophe.
Having now located a layer collision in progress you climb to the top of one of Jacinth's towers, unlimber your daiklave and wait... a long ass time. Again, minutes to hours to days depending on how much of a dick Malfeas is feeling like at that moment.
But the moment of truth arrives and you swing your sword and shout Heavenly Guardian Defense and... well, you don't get crushed. But the layer collision still happens. Because nothing in the Charm says you can deflect things that outweigh continental shelves by an order of magnitude with the Charm in question. So yay, you managed to accomplish jack fucking shit with your beginning level Exalted Charms.
But let us say you are not a freshly Exalted Solar and instead have centuries of experience and have developed a suite of custom Charms and artifact gear sufficient to allow you to single-handedly bounce a planetary mass away from you. Congratulations!
Now you have Malfeas' attention.
See, the Yozi are normally so fuck off huge that you are nothing more than a dust mite on them. You actions are so low in scale that you will never get their personal attention. Now imagine you were scratching an itch and suddenly something flung your fingers away from your skin. Well, now you have the attention of a sadistic titan-god-monster. Maybe he feels magnanimous and pfff HAHhahaha! Sorry, I couldn't complete that sentence. So most likely is what he does is he smashes the layers back together. Because they're not layers. They are his body and they don't move based on gravity. They move because he wills them to move. And fuck you, personally.
So now you are engaged in a ping-pong match with a Primordial and he doesn't even need to expend motes to keep driving down the layer you are deflecting with increasingly apocalyptic force.
And this isn't even the worse case scenario. Because it's entirely likely getting involved in an open conflict, as a hated Solar Exalt, with a Primordial joten, is going to draw the attention of some of the other Yozi. You might wonder, suddenly, why the sound of your conflict abruptly vanished and you look back and, whoops, all the demons you were trying to save are dead and a girl with brass teeth is staring at you with a smile and mimes to you 'What have you learned?' in a helpful way.
Let us say, instead, you have a sightly more likely to succeed plan. You decide to get a bunch of demons out of Malfeas. So you go around and use social Charms and bureaucracy Charms to arrange to get as many demons as you can to start following you in a march out of Malfeas. Well, again, I hope Cecelyne doesn't notice this and decide she doesn't like your pretensions to altruism. She doesn't even notice you, normally and she has no problems with you enslaving a bunch of demons but the strong helping the weak at their own expense. Oh man no, fuck that noise.
Or maybe you piss off a second circle of third circle whose serfs you are stealing. No, they weren't their serfs five minutes ago, why does that matter? Maybe Octavion just wanted an excuse to add to his desiccated skull collection or Ligier is just feeling pissy that century.
So maybe, somehow, you manage to save somewhere between ten thousands and a hundred million demons and march them across to Creation. Well, now what, genius? Because I guarantee you Heaven is going to notice an army of demons larger than most nations emerging out of Cecelyne at the back of a Solar Exalted. I don't think 'Wyld Hunt' so much as five or six Dragonblooded legions with half the Bronze Faction (and a few Gold Faction as well because holy shit what are you doing?) Sidereal assassins show up maybe with the Aerial Legion for air support.
So, uh, yeah. Getting the demons out of Malfeas is going to be only the beginning of your horror show of difficulty.
Let us say you anticipated this and instead of trying to set up a nation of demons somewhere in Creation you instead take them off to your preserve you Wyld Shaped out in the deep wyld somewhere. You fight off the harassing Creation armies long enough to start fighting off the harassing raksha armies who well remember the servants of the hated Primordials and have a bone to pick and manage to get all your demons in Demotopia safely behind you massive protective walls and defenses.
You succeeded. That's great.
And the next time you sleep the Ebon Dragon appears in your dreams and shows you the demons he created, ten times the number you saved, and is torturing to death as we speak. Just for you.
Out of spite.
Saving the demons of Malfeas is not easy, simple or straightforward. It also accomplishes nothing, especially if you believe that numbers trump everything, because the problem is not the demons.
It's the Yozi. It's always been the Yozi.