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

[Nayukhuut]

Idk the Nier event seems to indicate it was an attack so powerful that it resulted in the state of man. So that's another strike against it, possibly not being deliberate, which is something I've mentioned time and time again. Nice for that to be confirmed by the Nier crossover. It definitely can't definitively be called genocide.

It can though. She deliberately performed the Sundering attack, having prior knowledge of what would happen when she did. Maybe she didn't know EVERYTHING that would happen, but she knew it would create an entirely new species of man, and leave her species behind. Though I have to admit that I do quite prefer the term omnicide after seeing it a few pages back. It makes more sense as not only did she Sunder the Ancients, but all life on the planet.

Even if for some reason she had no idea that her attacks would wipe out everything on the planet (since she remembers us, I will hold this is not the case), her actions still resulted in the unintentional death and change of every life currently existing. The fact that it might have been an mistake originally shouldn't absolve her of her crimes. Whether mistake or intentional (and I still hold that it is intentional), she still should be held accountable for the death she caused. Yet the story holds her in quite high light.