If you think you are the smartest in the room you have an issue. Reality is manifold and to be smart helps to understand that and to keep all the different realities present, but different perspective and experience from others is crucial to have success. And: As nobody knows the future, a very smart person having a lot of information, can make very bad decisions in hindsight. Smartness is over anyway, AI is soon smarter than everyone, but does not have any experience or perspective, not even intent.