"Smart" is something you do, not something you are. People with very large amounts of raw intelligence fall down some very dumb intellectual rabbit holes that its practically a meme: https://www.smbc-comics.com/comic/2012-03-21

Having raw intelligence doesn't help if you don't apply rigor to your thinking. I suspect that very successful people actually end up falling into habitual mental shortcuts that cause them to promote stupid things at a later time.