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

[Lauront]

You're assuming she is cognizant of what goes on in other timelines divergent to the one she exists in and understands all the branching timeways. The way I see it, the Hydealyn of the 8UC timeline for all we know made the exact same choices as our Hydealyn up to the point their WoL died because to them they were in the only timeline. Or how would you explain 8UC timleine Hydealyn knowing they are 8UC timeline Hydealyn?

Why does she need to be cognisant of it for it to count as an example of failure? Also, the WoL, who filled her in, is aware of it.

Why are you ignoring the method by which the Ascians are using to bring back their dead? That completely differentiates it from what happened to us, and only enhances the fact that it's not their desire to bring back their dead that we have a problem with.

She's the one who put the Ascians in that position, after fracturing every life on the planet and eliminating her kind to the point she even refers to herself as the "last of my kind", alongside "supreme deity". Besides, they're not talking about the Ascians but the sacrifices planned before the sundering but after the planet was revitalised. Sacrifices which not a single source is specific on (beyond references like "new life" after Zodiark stimulated regrowth of the planet), and which her group does not dispute the ethics of, suggesting they may well be something closer to the entities created in Elpis. Her group's issue is they think the ancients should "move on" to avoid an eventual doom, but as far as we can tell, she never really informs her people as to the why of it beyond vague musings about suffering.