No, you can't argue that. No reasonable person would see "full self-driving" and assume it means they have to watch it like a hawk instead of taking a nap or watching a movie.

Well, at least no reasonable person before Musk had normalized this garbage.

My (non-Tesla) car has adaptive cruise and lane-keeping, and it works quite well. The car is certainly "doing the driving" to some extent, but "full self-driving? No, definitely not.