They go for the $. Or else they figure that they'll "be their own boss", get to push their opinions on others (not realizing that this is a difficult position,

They go for the $. Or else they figure that they'll "be their own boss", get to push their opinions on others (not realizing that this is a difficult position, and you might have a bias towards your own answers even if they're not the best outcome), and get paid more. Even if "they are the most effective managers" initially, it won't last. As the pressures to sit in endless meetings, tow the upper management line, create endless spreadsheets, they become less and less knowledgeable in their domain. I've had great managers who were "hands on" domain experts, and some who weren't. Luckily, the corporate trend seems to be towards so-called "flat hierarchies" and to fire these chair warmers. I for one welcome our AI middle manager overlords.