I think in this particular case it's because many people's first impression of him was as the dad on a cheesy sitcom or as the cheesy host on a family-friendly

I think in this particular case it's because many people's first impression of him was as the dad on a cheesy sitcom or as the cheesy host on a family-friendly funny video show. It's not like we had YouTube clips of his edgy stand-up stuff back then, so he kind of got pigeonholed as almost but not quite funny.