Because the only organized team activity are practices and film study, and walkthroughs on game day. Official practices are restricted to 20 hours a week. No coach is following the players around making sure they work out and eat clean. It's up to upperclassmen and team leaders to make sure that happens, and up to the coaches ultimately to make sure they do what they're supposed to. Moffitt draws up the plan, he can't do all that stuff for them.
