What’s wrong with Greer?

I know he’s been discredited and associated with people like Linda Molton Howe but a lot of what he says is in line with Grush Fraver etc. why is he not in the same panels, congressional hearings (especially since he claimed to have briefed presidents and Heads of Govt Agencies like the CIA)? It seems like there are two teams and maybe his CE 5 experiments got him in the cooky side but a lot of his stuff is in line with a lot of the investigative journalists we follow. But no Rogan for Greer, just dodgy YouTube Chanels.. any insight?