Rogan was only really interesting to me when he had amazing science guys on, like Prof. Brian Cox, and someone really engaging like Dan Carlin. Joe's style of sitting back, going "Whoa!" a lot, then asking a few more questions about what he'd just heard was fine. It kept the conversation flowing, and those types of guests were hugely entertaining and informative.
Sitting back and going "Whoa!" when Alex Jones spouts some absolute horseshit conspiracy theory, or when pseudoscience pushers mix 10% facts with 90% 'Big Pharma', is potentially very damaging to the uninformed listener. The recent attacks on a genuine expert in archaeology, just because he destroyed Rogan favourite, Graham Hancock, in a debate, is proof that this show can be toxic.