attributes of top salespeople

We watched GameStop: Rise of the Players and despite it being a documentary, found it to be quite entertaining. It was David versus Goliath.  It was Amateur versus Professional.  It was about an improbable outcome accomplished by people who were unlikely to succeed and even more unlikely to win the big payoff. 

While I thought it had a lot in common with selling, the twelve central figures:

Were not professional investors although they did invest in GameStop.
Were not skilled traders although they did conduct some research.
Did not trade as a full-time job or hobby.
Were making decisions based on hunches, not history or science.
Found in each other kindred souls with a shared passion for GameStop.

The five statements above suggest that skills, attributes, competencies and capabilities were NOT part of their success so what could this possibly have in common with selling?