How much feel good and drinking relationships matter in upper management. And on the downside, how little facts weight in when compared to a manager's gut feeling. Enthusiastically presenting a (factually wrong) solution can be a winning strategy. In high school, I thought I was a math genius because all of my solutions were judged as correct. Turns out, I was just a good presenter and nobody made any effort to check…
This is because management is ultimately a job about people, and manager to manager relationships demonstrate one's skill on that axis. I think all of us would rather work with a coworker or boss with middling competence but who is nice to us, rather than a brilliant asshole.