Dumbass only in a narrow sense. If you ask who, overall, is the most intelligent, best-prepared athlete, I'm not sure what the answer would be between Rapp and Potts.
Sometimes we here get so caught up in the minutae of bro-tech that we lose sight of all the really important things it takes to win races. And Potts knows how to win races.
And I use "we" because I'm fully guilty.