This is just more nonsense, the engine obviously plays the role of the DM. Furthermore, DOS 2 had a game master mode, so I am pretty sure that BG3 will have a DM mode; there you go now it's D&D according to your odd rules.
- - - Updated - - -
I find this whole discussion somewhat baffling but I guess I see the point that many people try to make about BG2/BG1/DoS1 & 2/PoE1&2/ToEE/etc., it's a very niche genre and I guess more people would be into it if it wouldn't be an isometric crpg. Problem is, it was always going to be just that; anything else and it can't be called BG3 (I know this will derail everything again into: it really shouldn't be called BG3 anyway). If people want a more action oriented game they should look into the upcoming Baldur's Gate Dark Alliance.
EDIT: Also the same goes for turned based for RTwP. D&D is inherently turn based. Recent RTwP games like PoE2 and I think even Pathfinder: Kingmaker added turn based later on popular demand. RTwP is even more niche at the moment. I am fine with both systems, I don't really have a preference, but as you say, turn based just makes more sense from a D&D point of view.