only a real actor who is X in real life should play a role about X. Which is…not entirely how acting works.

I just have to assume that these people never watch any fantasy or sci-fi, since it’s gotta be a real birch finding elves and aliens and centaurs and death robots and orcs and lizard people.

Like… it’s literally called acting. In a sense, their entire job is to lie (convincingly) about who they are.