Who's "we"? I'm talking about D&D, in the context of an OP that asks about certain attitudes towards it.We're talking about non-narrativist D&D here
I'm not arguing whether or not the ability should be in D&D (that's a commercial decision for WotC), nor whether or not you should "be OK" with it.Prince Valiant is not any version of D&D, not even 4e (which is probably closest). In a game with those design parameters, an ability like that is fine. I am not ok with it in D&D because, yes, the fiction is terrible, and to me the fiction should inform the mechanics as much as possible.
I'm arguing that the fact that you (along with whomever else) don't like it, it doesn't follow that it is a supernatural ability.