Because they are dumb as bricks and nothing but fake-ass idiots they wouldn't get that right.
Everyone who's into metal knows that hyper-masculinity is simultaneously the most hetero macho manly thing and the gayest shit ever.
Judas Priest, Man-O-War and others like that look like leatherfags and are ultra manly cool at the same time.
Reposting because this is what I mean:
He looks gay as fuck and rad as hell. You know a guy like that would be the ultimate pussy destroyer. Bitches loooove guys that kinda dress like fags. They can't turn JoJo into something for actual faggots because it already is and because it would just end up getting panties wet and straight guys would also think it's rad as shit.
I mean, let's face it, they can't have actual gay sex in it. The best they could do would be to make it as overtly gay as possible, which JoJo already kinda is.