I'm stunningly smart and I loudly make inane comments all the time. This is because I am also stupid.

(Now that I'm older and fatter, I'm realising just how much shit I got away with by being pretty when I was younger. It would have been worse if I hadn't been oblivious to it.)

It is quite important to be aware of one's stupidities, particularly when smart, or one will never be able to even start to alleviate them.