To be fair, a lot of them are v intelligent, a lot come from Cambridge Footlights but not Benedict. They get a taste of fame, and go for that instead of brain surgery or whatever.
Ben Miller, who spends a lot of time playing the fool, seems to have a v good understanding quantum physics and was being v clever and funny on R4. He (started) a PHD in physics. Or it might be Alexander Armstrong.
You're all going to tell me you know him and he's a dick now, aren't you?