I would agree with you on that point, if not for the fact that Swen himself stated in one of his interviews, that Larian had full autonomy during the development of BG3 and WoTC didn't force them to change anything. Now, if Swen spoke the truth, is a completely different matter. Personally, I find it extremely unlikely, that WoTC didn't at least try to meddle with their corpo-autoritharian ways.
Even so they are following official D&D rules made by WotC here. Larian didn't invent this system. And besides, this is the system we'll be getting in the game which is coming out in less than two weeks. There is no use in complaining about it now...we're past the point of early access feedback. So make the best of it.