Except the PHB literally talks about certain races facing distrust and prejudice because of past events or stereotypes. WOtC aren't the ones pushing this, this issue stems from a lack of effort, not someone putting effort into deliberately making the game bland.

This problem isn't exclusive to 5e, nor to BG3, I've seen it in multiple crpgs based on D&D. Hell, it's not even exclusive to D&D in particular, it's also been an issue for Elder Scrolls games in the past.