Cadets and the military are held to higher standards that those required of the commander in chief. They are just following his ethical and moral code.
The reality is that regardless of their standards they still have to get cadets from society. Our society is sliding and so is the quality of the cadet corps. This happens across the board at all the service academies. If you are looking at a student who is dumb as a box of rocks he is most likely an athlete, but moral failures can come from any portion of the respective corps or brigade.