Getting drunk is legal. See that's what all you pot heads and non smart phone owning people just don't get. It's not that pot is bad for you, or worse than booze, basic menthol 100's, or watching Fox News... it's that it's ILLEGAL.
Pot is no big deal, provided you don't have much to lose. If I get busted with a J the fuzz planted in my 79 Monte Carlo with only 184,000 original miles it's not a big deal. I just take back some cans or sell some blood and pay the fine. Chester down at the plant don't care if I get high once in a while, as long as I stay off his foot with the forklift.
Now someone who stands to lose a starting position, and more importantly a football scholarship, and still pulls hits from the 6 foot water bong... well that is a big deal, cause he's got a lot to lose.
It's not smoking pot that's a big deal, it's the decision to do something illegal which would place his standing on the team in jeprody.