Who do you think is booking guests? Managing the topics and discussion for each show? Curating latest news and content for the show? Who do you think is editing the production? Making sure the set and equipment is straight?
My point being, I'm willing to bet they do more than just sit there on screen. There's a lot of stuff that needs to happen behind the scenes to have a focused show that is good. They probably have a production background and do everything else other than talking.
Also... Do you know if they're all random? They might know them from college or from HS. I get the thread, but at the same time it's stupid