> ...I’m not sure if every post will end up being occupied by an incompetent manager, but I do think that when a lot of managers realized they’ve hit their peak or comfort level, they then start to focus on playing politics instead of delivering results to hold on to their position.
I have an alternative theory.
When you're a single contributor you have total control over your productivity and success, but very little impact on your the company's success. Then when you're promoted your control decreases, but impact rises. As you move up the ladder you are constantly trading control for impact.
Eventually you end up as CEO and these numbers converge with a large impact relative to a single contributor but little control over the success of a company. Little enough control that its sometimes hard to distinguish from noise. But your affect on perceived success drops off at a slower rate than actual success. This means to get promoted at higher levels it is more impactful to focus on perceived success over absolute success, and people who are better at this will have more luck getting promoted at high levels. Basically it's a lot easier to convince the board of AT&T that you're doing a 3% better job than to actually get the company to perform 3% better.
This would explain why most non-founder CEO's are so polished.