Even being really good at [insert profession], doesn't make you non-stupid in areas outside of your expertise. It's not mutually exclusive. E.g., one can be a b

Even being really good at [insert profession], doesn't make you non-stupid in areas outside of your expertise. It's not mutually exclusive. E.g., one can be a brilliant orthopedist, but can still be considered really stupid when it comes to forming a coherent general world-view.