I think it's moreso of the selective outrage everyone seems to have. It's all pitchforks and burn it all down until someone else gets thrown in, then it's "leave that man alone" when then entire movement has supposedly been about coming for everyone equally.
It's not really only with black men. The stories about Weinstein were well documented for decades, with people calling for his head. Not enough, more like the right people didn't care. And same with those other white celebs with the same skeletons, black people in general don't know or care, so they talk about the names they know.
But overall, they need new terms. The generalization of the terms "rape" and "pedo" are what's causing these problems, when they used to refer specific incidents not too long ago.