What's the point with that quite lackluster story in Endwalker?

[CrownySuccubus]

What? That's what I said? It's about stopping Zodiark because Zodiark is the means by which the Ancients wanted to reclaim their paradise.

No, Zodiark was merely a means. The point of the sundering was the induce mankind into suffering and death. Sundering the planet, and thus Zodiark, was only a means by which to accomplish this without undoing the laws of physics Zodiark had woven into place.

There is no doubt that creation magic is fundamental to their society, but not to their being. So Venat removed their ability to fly, but they can still walk by their own power. Creation magic is something that can be taught, like with the Loporrits, or to the sundered with (and maybe even without) modification, like with the summon rituals.

So let me get this straight. Your argument is that to remove an ability that a species has relied upon to not only create their society, achieve their own personal agency, and defend themselves is not an "injury" because technically they can still "walk".

Okay, so listen. If I break your kneecaps right now and you lose the ability to walk, it's okay because it's not fundamental "to your being". After all, you were born crawling, so if I remove the use of your legs, you should be able to get by just fine crawling under your own again.

Also, no. Creation magic cannot be taught. You either have it or you don't. No Ancient ever needed to be taught to do it; they make it very clear that every Ancient is born with the ability, and that no other beings besides them can do it. Same with the Loporitz. They were created with the ability. Likewise, you can't teach it to sundered beings -- summoning is the most similar you can get, and it's stated several times that it's not even close.

Even IF it were teachable...you know something that humans need to be taught to do? Walking. It takes human beings several years to learn how to walk, and if you lose the ability to do it for whatever reason (for example, through injury), it takes a very long time to learn it again. Feral children that were not taught to walk in their infancy find it pretty much impossible to learn later, and trying to teach them actually does more harm than good. So even if creation magicks were analogous to a learned ability (which, again they aren't), it would be the same as removing a human being's ability to walk on two legs. And there is no way to describe that other than to "injure" or "cripple" them.