I think you're misinterpreting me. I spelled it out pretty clearly, I think. By politics I don't mean being liked, I mean being manipulative. Which is a related, but different, thing.
The delusional confidence is also a form of manipulation. Basically you influence others perception of you by lying and distorting reality. And you use emotions as a weapon. People like good feeling emotions, so you do actions to make those emotions appear in people. Flattery, deception, undeserved confidence, that type of thing.
The best leaders are people who are honest, rational, level-headed, and have a community based outlook. Meaning, they put the needs of the company and their team first.
The leaders we actually get are almost the exact opposite. They're individualistic, selfish, deceitful, and emotionally manipulative.
The reason that happens is because of how we decide promotions and the culture of the company.