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

[Sicno]

of course they seem manufactured, meition created them from...

No, what I mean by "manufactured" is that the hand of the writer is so heavy you can almost see their fingernails on the screen. Even accounting for discrepancies in Meteion's reproductions it's clear that the intent is to show how our "sundered", "imperfect", etc. beings can find more meaning in life than them, who reached the pinnacle of whatever it is they wanted to achieve (except for the dragons). That having the main cast prevail over them is proof of their determination, principles, etc. and that Venat was "right" in creating such beings.