I'm fortunate that most of my time is spent with very smart people. Their brilliance is magnified while operating within their realm of competence, where they are often correct.
However, I've observed it's not uncommon for smart people to meander beyond their realm of competence under a misplaced faith in their abilities. In these scenarios, you watch smart people go from being correct to incorrect.
The danger of incorrectness is that it is often paired with a state of delusion, in which the person has complete confidence in their opinion.
Smart people, who are incorrect and convinced of their delusion, have the unique ability to manipulate others in favor of their beliefs despite reality. An incredibly destructive phenomenon.
If you work with brilliant people, my advice is that when faced with an opinion that you believe is wrong, take a moment, a day, a week, however long it takes, and question everything.
And to the brilliant, you must consistently question your position, or else risk delusion and destruction.