The reality is that it's not a great system for a videogame. Tabletop D&D keeps it because it is easy to run at a table and doesn't disrupt the flow of the game, but if I were making the game I'd ditch the entire 5e skill system and replace it with something else.
The extremely thin and uninteresting skill system is one of 5e's weakest points anyway, I don't see why anyone would want to put in the time and effort to replicate it.
I would agree. D&D has always been highly abstract to make it playable on TT. The high variance randomness is part of the charm on TT but is at odds with the preferences of the majority of videoame players.
Of course, there is actually no need for dialog options of BG3 to use skill checks at all; that is Larian's choice. My main criticisms are not about the D20 skill check rolls, but the lack of any consequence or difficulty hints before selecting options.
