With Sanjay Gupta, he brought him on so that he could have a debate about the COVID vaccine, and Gupta conceded many points that Rogan made. He never has "gotcha" questions like many journalists, and I believe it's an entirely honest discussion with all of his guests. For example, he has had hard-core pro-Palestinian journalists like Abby Martin, and very pro-Israeli talk show hosts like Ben Shapiro. He's had politicians from all sides of the spectrum. He is more than willing to have people debate the COVID policies and vaccines but no one takes him up on his offer, like Peter Hotez. He has some independent journalists like Alex Berenson who is very much against the legalization of cannabis, something that Rogan uses often.
In terms of "fringe beliefs", what do you mean? I like the fact that he has a variety of topics, some of them absurd, like aliens. Not everything has to be serious.