In many scenarios the most important skill you can have is the ability to ignore common sense. The drawback of that ability is that people without common sense

In many scenarios the most important skill you can have is the ability to ignore common sense. The drawback of that ability is that people without common sense are very often seen as assholes since most of our social fabric is based on mutual common sense. Or in other words, a person who is brilliant thanks to his lack of common sense would not have been brilliant if he had common sense. And convincing a person without common sense that learning common sense would be good for him is very hard, most likely he will just ignore it like he did all other common sense things he have been told to do in his life. Therefore it is inevitable that asshole leaders who lack common sense will continue to appear and thrive, because those with common sense can't do the job.