Joe Rogan would interview Dr. Fauci if he were up for it. He would even let Dr. Fauci talk and defend his position for 3-4 hours if he had that much to say.

I wouldn't call the guests on his show "fringe". In fact blanket calling all the hundreds if not thousands of people he had on his podcast fringe would require whomever said that to be someone who thinks through a groupthink/xenophobic mentality of believing the other side is evil.