Why do you put it in quotes? He did AI research and published papers at MIT, also he taught a (or more) Deep Learning course at MIT with lots of participants, the lecture recordings are available on YouTube. I think it's quite clear he knows his stuff and isn't a bullshit artist at all.

He is well prepared for the interviews, he listens intently and asks important and curious questions to high profile researchers. The discussion is often at a level (of technicality) that I haven't seen anywhere else for a very very long time. In the age of oversimplified soundbites and 3-5 minute interviews for the lowest common denominator average lay audience on mainstream TV, Lex brings a breath of fresh air and proves that long and difficult interviews that dig deep can also have their place.

Look through his archives and pick a guest you are interested in. If you are interested in AI discussions, I'm pretty sure you'll find tons of interesting people on that list.