This is definitely a why not both sort of situation. In fact, I think being dimwitted is often associated with being evil, since goodness is (often) just rational self-interest.
negativity is usually the easy path so evil and dimwittedness go together quite well.
Zuckerberg got enthroned when he was like 22 and has been primarily interacting with people who want something with him, while not having any wants himself, since then.
He's not necessarily dimwitted but it would take an absolutely amazing person to understand the 8 layers below him without having lived any of them. Of course he can't transcend Meta into something beyond what it's become.