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

[Sicno]

The alternative explanation is that their societies weren’t perfect and instead simply traded one form of suffering for another. They achieved what they thought was perfection, worlds without sadness, pain or loss, when in reality they were just as plagued with suffering as “lesser” races. A perfect society would not kill itself after all. Perfection thus is bad, not because it’s a bad thing in itself, but because it’s an unobtainable goal that one will never achieve. And if one does think they have reached it, then they are wrong.

Because that's just the way the game presents these societies. A very basic caricaturization of different perceptions of "perfection" or "the peak" because they're not meant to be working societies, they're just hero fodder. It's "mustache-curling laughing villains" levels of caricaturization. They themselves believe their designs to be perfect but the 5 year old audience can easily point at the flaws in their plan and then cheer when the heroes do just that.