IMHO, tech is a hostile environment with a lot of poor managers. I think the Peter principle applies to a lot of managers in tech. Promoted past their skill set. Just because someone is a good engineer does not mean they will be a good engineering manager. Managing humans with needs, concerns, ideals and life goals is so very different than managing a code-base. Executive leadership needs to consider this when building teams and figure out how to make and/or recruit good managers.
I wouldn't scope this down to tech. Incompetence and professional disinterest is by far the norm across all industries.
Career meritocracy is, more or less, a myth. In technical fields, there is a merit baseline that has to be cleared, but after that, any further relationship between merit and position evaporates. That is inescapable. People sometimes think they've escaped it and found the promised land of meritocracy, but they haven't. That usually just means they have a politically-skilled manager who is good at keeping their belief in the fairy tale alive.
I agree that a good engineer is not necessarily a good engineering manager, but I don't believe there are good engineering managers who are not also good engineers.
