Do you think graduating from a top university makes them smart? Do you think working at a top hospital makes you a great doctor? Etc. There is a distribution everywhere. At top universities it just might be not as wide as some other places.

You should watch closely the people you admire. Donald Trump is as successful politician as one can be. He is as rich as one can be. He has a degree from a top university. But he's a useless person and dumb as a rock. If you try to follow his way you will get nowhere. Good luck.