In my Division 1 days (75% scholarship, alas, without board) I found that drinking to any degree was problematic. I did notice that one or two drinks in moderation was a welcome diversion from a psychological standpoint, but that given my diet (I went to university with no financial help from parents or anyone) was for many weeks diluted pancake mix and potatoes, I was constantly on the edge of getting sick or being sick. Nothing major in terms of illnesses, but combined with hard training (3:40ish 1500 guy), my immune system was not very capable. I found that I simply could not drink, even though even though at so-called college party blow-outs I had never had more than two beers. Not sure of the medical science behind it, but just learned to avoid drinking as a cold, flu, infection too often took hold. In hindsight, I think the better choice would have been to choose a school I could afford (I was admitted to a service academy as well), eat decently, and to have lived a balanced life, which likely would have included some modest alcohol intake (I don't drink at all today because of health restrictions, but it is hardly a burden as I can live without it).
I have lots of humility and am fearful of moralizing over alcohol. I had a completely and totally absent parent (a nice person by nature) due to alcohol. This was all her reaction to horrific abuse being visited on her, but at some point the addiction took a strong and inexorable hold. I have had to take care of her in one way or another my entire adult life. I have always had a voice in my head as to any sort of addictive propensity, knowing it can happen to anyone. I think keeping that inner voice in your head is helpful.