The thing about Rogan is he's just as likely to have someone from the far left on the podcast. He's had Sanders on, and endorsed him during the primary. But man, he's a weirdo intellectually. I get that he prides himself on his "open mindedness" but that doesn't have to include believing in total nonsense.
However, the left's vilification of him is counterproductive. There is a certain, not-insignificant subset of America that might be willing to vote for a Biden, but is so sick of being told they're Nazis for listening to Rogan (or similar choices) that they end up spite-voting for Trump.