The drawback ti human enhancement drugs. to study sport etc.

 The intuitive worry of authors who take this question seriously is that biomedical enhancements might not only create corrosive short-cuts within valuable social practices, but also rob those who use them of things they otherwise cherish about themselves—endurance, determination, growth, faith, even luck—by substituting “hollow victories” for authentic achievements. 

Losing the experience of authentic achievements, in turn, diminishes the character of the user (Sandel 2007), alienating them from themselves and those around them (Agar 2013), and diminishing bonds of solidarity with non-users