I think this maps roughly to the idea of some people being "introverts" and others "extroverts". Extroverts are good at selling themselves, they enjoy that act

I think this maps roughly to the idea of some people being "introverts" and others "extroverts". Extroverts are good at selling themselves, they enjoy that activity. Introverts are interested in how to do good work, not in selling themselves. They don't like to go to job interviews, because that to them is not solving the interesting problems they are working on.