A good option for celebrities would be big pod casters and/or YouTubers. For example, Joe Rogan talks to a lot of random people about new technologies, science, etc. He, I believe, also has the largest podcast in the world, and a pretty big YouTube following too. He’s a self described Libertarian, big on free speech, which would be an easy in to get him interested. We would just need someone to volunteer to talk to him, which I’d imagine would have to be Irvine.
Another option might be H3H3, who are also big free speech advocates, and formerly big YouTubers. They have since branched out into a pretty big podcast.