Between a cobbler and a wizard? This is a strange hill to die on.
Well the differences between PCs and NPCs pretty clear. They clearly follow some different rules, even if they share many.
And yes, Iron Man is pretend. So is Spider-Man. When I watch an Iron Man movie or read an Iron Man comic, if Spider-Man doesn’t appear as relevant to the story, then he’s not “doing” anything.
The comment is not at all directed at anyone’s preferences unless they prefer crappy analogies to useful ones.
But the background features don’t let you influence anyone no matter what. They let you influence certain people under certain circumstances. Which is what skill use also allows.