Hypothesis: the "people who get stuff done" are a subset of a larger group with the same personality and talents, but without as much luck. Those other people are known by unprintable names, because they have no great successes to make people ignore the fact that they're jerks.
This is sports and really any competitive zero-sum area in a nutshell. To be in it you have to have an inflated sense of your possibility of success, but to have said success you nonetheless have to be in it, so anyone who makes it is going to be a person with somewhat unrealistic reasoning, but since there's no feedback loop they never get the message that their reasoning was unrealistic.