People are so used to shows and popular voices pushing agendas that it seems they're flummoxed when one isn't doing that. Apparently under the impression that Rogan is endorsing everything his guests say and that his listeners just blindly absorb/repeat.
But he isn't pushing an agenda, isn't telling you what to think, doesn't filter by ideology. He's just having conversations with people that he thinks are interesting and treats them respectfully, like a friend would in real life. That's why it resonates, is refreshing, and will continue to mystify those that expect everything to fit neatly in a pre-defined, pre-approved box.