not necessarily. before his appearance on the JRE podcast I didn't know him at all (i know i live under a rock), yet i've found his ideas compelling.
Although Joe doesn't invite nobodies for the most part, so i might be wrong to some extent.
you just explained it. joe rogan does not have nobodies. think of how many ppl write to him asking to be on his podcast. think of all the mail his producers get.
