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

[Nilroreo]

Her description. Notably missing: the fact that Zodiark restored the star, that he was the one shielding it and required for her plan to even work and was more than just the manifestation of some "ill-fated" (because of her) wish, the fact that she withheld information from her people, the fact that only a sliver of mankind met her "test"... No, it's just all about Her luv 4 Her childrunz...

Yeah there's a lot of sugarcoating going on with a bit of revisionist history sprinkled in here and there. It describes her as "She who has long kept Etheirys turning," but that was a best a joint effort between the two of them, not something that can be solely attributed to Hydaelyn as there wouldn't be an Etheirys worth saving without Zodiark to begin with. It refers to Zodiark as a "Manifestation of that ill-fated wish," conveniently disregarding the circumstances behind his existence as a band aid solution to a problem they couldn't reasonably be expected to fully comprehend on their own.

Though my favorite part was "However, she knew that from their imperfection-their suffering-would arise the strength to face deepest despair." Last I checked, it was the Warrior of light that carried humanity through the final days. Both we and Venat learned the truth behind the final days at the same time, but where she decides to withhold that information from her people, we go on to share it with ours, and as a result, an interesting development occurs. Sharlayan, a solitary nation primarily concerned with self preservation is shown the truth, and allows us the opportunity to repurpose their one and only chance to escape the planet come the worst case scenario into a vessel designed to send us to the edge of the universe. It was the truth that ultimately convinced a stubborn nation to give up on escape and allowed them to open their minds to new possibilities. Without the truth, Etheirys was done.

We can never know how much better or worse the ancients would've fared had they been as fortunate as us. But when considering why Zodiark exists as he does and the VERY specific purpose he serves, I wonder: had Venat actually shared the truth, would Zodiark have even needed to exist as we knew him?