Exactly, which is like saying "eating a high protein breakfast increases athletic performance." It may be true, and it may be applicable to the average athlete,

Exactly, which is like saying "eating a high protein breakfast increases athletic performance." It may be true, and it may be applicable to the average athlete, but even if such a study was proven conclusively, I would not expect the top athletes in the world to change their breakfasts because of it - they have already achieved an outlier result and changing something is more likely than not to cause mean regression.