Not quite sure why you think comedians are naturally assumed to have a higher than average IQ.
I know many funny people and none of them are what I would consider to be above average by mnore than a few points at most. There are some actors that are Mensa qualified, but not many. I am not that person.
Not sure about Meddling Midler but she strikes me as arrogant, full of herself importance, and an airhead with a big mouth.. Just my perception.... YMMV.