You know, I just got it. I just got why race and gender swaps of white characters are generally more accepted than race and gender swaps of black characters.

See, with white characters, there are precious few characters that have their whiteness as part of their central identity. You could take, say, Ant-Man, and make him black, and as long as he was a shrinky scientist with neuroses he'd be true to the character. Nothing about that HAS to be white.

Danny Rand is a rare example of a character whose whiteness is integral to the character since the whole point of him and his friendship with Luke Cage is he's a rich white guy who doesn't really care about any of that because of his upbringing. He's one of the few guys that you couldn't really make anything but white.

But look at black characters: their blackness is integrally tied into who they are. You couldn't make Static Shock or Luke Cage white because that sort of urban fantasy and black identity is integral to them. They wouldn't be the same.

So clearly, we need more characters who are incidentally black, where their blackness isn't integral. You could make Moon Girl indian or something, and so long as she was still a little girl who was too smart for her own good she'd essentially be the same.