I mean, that's the worst of both worlds to me. If you're gonna do a colorblind casting, ok. If you're going to go with a sort of "fantasy" world loosely based on 19th century England, ok too. But to go with something SO ahistorically ridiculous like early modern Europeans being totally cool with creating a multiethnic society just because the king had a black wife, c'mon that's ridiculous. Reality is if a king did that back then he'd probably find himself murder by his brother and no one would give a shit.