That's literally just a longer way of saying that it's okay if it's magic but it's not okay if it's black people.
& yeah, I'll hold my breath for people getting equally upset about white people in fiction. Any day now. I'm sure.
I can't disapprove a hypothetical, I guess, but a hypothetical isn't proof of anything either.
People made these exact same arguments about the inclusion of a black samurai in an Assassin's Creed game.
A black samurai who was based on a real person who actually existed in history.
The game they're playing is very obvious to anyone who's actually paying an ounce of attention, and it has nothing to do with caring about historical accuracy.
It's bullshit. It's an excuse. It's foolish. I do not suffer it gladly.