Earlier quoted context omitted.
Actually it is not. Well, the HBR studies cited, here, indicate a correlation between a manager who could do their direct report's job and job satisfaction of that direct report. It does not claim that this is necessary for direct report job satisfaction, only that it makes it more likely. So, my comment could have been better phrased as: The reality is that in order to effectively manage, it helps if they understand…
Yeah I think there's a balance here. One of my favorite managers also didn't understand my project (although he did understand software engineering in general) and I later found out everyone else hated him. I've seen what I suspect is similar later: managers who just see their job as defending their team. Someone needs something from the team? Push back. Their teams needs something? Hound those responsible. Team has…
A CEO, like Jeff Immelt of GE, cannot possibly know how to do all of the jobs of all of the people in the entire company. Yet, he somehow does a good job of leading GE.