I think it's that he made one joke in one comedy special that the internet freaked out about so he decided to make everything that came after about the people freaking out and not the material itself. The fact that no one can see that is itself sort of amusing. Ricky Gervais had a trans bit in his most recent special and the internet seemed to not notice, so there's been no need for him to address it, I guess. Or maybe it's because everyone already knows he's a nihilist and wouldn't care one way or the other was the critique is, whereas Chappelle very deliberately makes contrasts to the civil rights movement and the neo sexual revolutions, which I think rubs people the wrong way. Richard Pryor did the same thing back in the 70s...agreed to do a gay rights rally, then lambasted everyone for looking away during the Watts riots. It made the whites mad.