Nothing wrong with being a podcaster and getting tens of thousands of people excited by ideas and interviewing a great collection of people from an informed perspective (at a minimum more informed than the average podcaster/talking head).
Not everyone needs to be doing hard academic stuff. There's plenty of value in communication.
I could have given this lecture, and I think I could have made it much more entertaining, with fun examples.
Lex should stick to what he likes, though his interviews can be somewhat dull. On occasion I learn things from his guests I would have had no other chance of exposure to.