I think you’re simply misunderstanding what “3D” means. 3D does not mean real-time, dynamic, or anything else. It simply means 3D. BG3 is entirely in 3D. Every single asset is 3D hell the entire explorable world is 3D. So yes, it quite literally is a 3D game. With action. Making it a 3D action game.
Think of what the alternative would be. Is this a 2D action game? Obviously not.
If you’re looking for a 3D real-time action game then yeah, this isn’t that. But that’s not what anyone’s arguing.
Edit: Also… is your argument that a game like Morrowind isn’t in 3D? Just because hits are handled by dice rolls? That’s insane lol.