Talk show hosts don’t engage the audience or their guests during the commercial breaks. As a kid, several of my family members wrote for Carson and I was often at Rockefeller Center to see the show. Carson never spoke to his guests or the audience once the lights went down. Something about “saving it for the show” was always the answer to my question. Comedians are infamous for not being either funny or particularly pleasant off-stage. They’re kind of angry.
That has absolutely been my experience. They say comedy comes from pain, and many comedians had tough childhoods and learned to be funny to protect themselves. They tend to have issues.