People forget that this exact dynamic caused Henry Ford to go from being a figure of near-universal reverence to the paranoid racist crackpot "Crazy Henry" of later life, taking his company from total dominance to near-bankruptcy in the process. https://twitter.com/A_W_Gordon/status/1276571313168097282

There was one other key fundamental factor in Henry Ford's downfall: nobody in his personal or professional life could impose meaningful constraints on his behavior, no matter how much it may have been in his or his company's interests.

Ego and genius can accomplish amazing things, but also impose an often-impossible challenge: how do you preserve the good that a brilliant individual can accomplish by constraining the bad that comes along with it? If the individual has a taste for sycophants, you basically can't