Boelts was a worker on the bicycle, Ullrich had more talent than anyone else during the last 50 years. But in terms of mental toughness and work ethic, nobody could touch Boelts. So he felt entitled to scream at his captain when he appeared to not give it his very all.
The unorthodox strategy paid off, Ullrich ended up winning the tour. Bodybuilding is exactly the same, Dorian Yates was not the most gifted bodybuilder, Flex Wheeler was. Yet, Yates has 6 Mr. Olympia titles, Wheeler zero. The reason is: work ethic. Yates didn't take time off, never missed a workout, never missed a meal.
So whether you got Yates or Wheelers genetics, you still have to eat your chicken and do your reps.