Something I've learned is that most people are only really good (that is, good enough to contribute notably and distinguish themselves) at one thing. A few of us are good at two things, but even there, those two things tend to be related more closely than it seems at first. This is part of why our society has such horrible leadership, especially in the private sector. People who are good at climbing bureaucratic hierarchies, most typically, are not good at anything else: not very smart, not very ethical, etc.

Academia was supposed to protect people from having to do the things they're bad at--such as sell their ideas to people who lack the ability to deeply understand them--and, unfortunately, it went derelict in that duty a long time ago. Salesmen, in any field other than sales, are like an invasive species who outcompete the natives with their superior social polish, but who struggle to actually do anything, which leads to systemic underperformance and the erosion of trust, which only makes the competitive necessity of salesmanship even greater, setting in motion a death spiral from which a private entity (or, in the long term, an entire industry) almost never recovers.