Sure, playing chess needs intelligence, dedication, and good chess players are smarter than an average person. But it’s waaaay exaggerated in movies. I’m a math researcher, and in any movie, my department will be full of chess geniuses. But in reality, only about 10% of them even play chess.
I’m dumb as rocks at night but I won 3rd in a competition once. My brain does that thing the DVD logo does on your TV when you’re not watching anything but I can get a bunch of bullshit into the middle of the board really fast.