While those numbers do seem high, you have to think about how these are elite people that are in positions that not the average joe can get into. Their public persona does not translate to their intelligence. Acting may seem easy, but to convey a feeling or emotion is rather difficult, let alone be casted several times in major motion pictures. You’re literally judging these books by their covers. Do you think you could talk to a crowd of people every night and host famous celebrities and have engaging and comedic interactions with the audience like Conan OBrien? Do you think you can effectively and succinctly talk about human trafficking like Ashton Kutcher? Can you make people laugh by creating an aloof character like Mr. Bean as does Rowan Atkinson? Celebrities are (mostly) famous for good reasons, thus to dismiss their intelligence based on some biased viewpoint doesn’t seem like the best way to go about this.