Someone elsewhere in the thread mentions that the whiteboards are just background scenery. The sitcom itself is pretty formulaic, written by the same writers as every other such sitcom. Changing the scenery is much easier, as opposed to changing how these writers understand their material, I guess.
But he doesn't just consult on the whiteboards. He consults on many aspects of the show that touches on science, and that importantly includes scripts.
No, I get that. But using this logic, BBT shouldn't be making any attempt to get the physics right either. After all, it's not a show for physicists.
Why the inconsistency?