Character development in RPGs seems to be for NPCs only. I suppose it's difficult to write around a player character who changes, but I think it has more to do with low expectations regarding the average players willingness to roleplay in their game.
There should be more of a back and forth between the characters in Baldur's Gate 3, especially if you're playing an origin character. They can't be curious about your character because that would mean taking into account all the interesting permutations that would entail. I wish they considered this more of a core aspect of RPG games but alas.
