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

[Nayukhuut]

True, but I think its more so that she realizes as well as the audience that the Ancients's way of life and civilization of eternal paradise would eventually be its downfall, because of Meteion's report confirming that many other civilizations strived for the same paradise as they did but wound up destroyed. The game shows to us the flaws in their system through both the MSQ and quests in Elpis and Dream Amaraout. There's also the factor that the WoL being there and the events and experiences he/she shared to Venat privately convinced her there was some worth and hope for the star's future due to mankind having to learn to adapt and grow from what we consider the everyday struggles of life. Most of these stories in jrpgs are always written in criticism of the concept of a "utopia" so its most likely the reason why the writers wanted to make Venat come off that way as a Prometheus like figure; which goes with both her character in this game and in FFXII where the Venat the Occurria rebelled against her own kind to give mankind true freedom.

The Nibirun are not a good parallel. Not only did they value different things than the Ancients, they were also shown to be open to reason in the end. As for the Sundered not being on that path, we could easily end up as the civilisation in the Dead Ends too. We are certainly more prone to things like war and over using resources than the Ancients were.

I think the reason why it doesnt get called out because it would acknowledge the paradoxical ethics of mankind. In which villians actively trying to destroy your life is considered wrong but if the Scions criticized Venat/Hydaelyn for her actions then they would have to deny their own existence. Ilberd, Thordan, Emet-Selch etc where all active antagonists wanting to kill us so of course they are the villians but to them we arent worth as living beings because they value something greater (which was the theme behind Shadowbringers and Emet-Selch). And the event of the Sundering happened millenia ago by the time of the game so there was no point to judge Hydaeleyn for her actions because its the whole crux for why we exist in the first place.

Because seriously how would you even respond to this?

"How dare you do this thing to your people which created our existence!" Should we just accept that the Ascians are in the right all along and that we dont mean anything?

I would have taken a "This is the world we have no so we will fight for it and our lives, but Venat was still wrong to do what she did to an entire people" approach. Basically acknowledging her actions instead of just comforting her and pretending she's nothing but love and life. We only have the option to comfort her. I would have liked to call her out.