FWIW I agree with Buckeye McFrog. I have seen many careers in the military (70's-80's) and civilian world "self terminated" by pot use.
So, by that logic, we could conclude that any activity, behavior, characteristic, noun, adjective, or verb with the potential to diminish, in a practical sense, a person's ability to engage in a career of some sort, should be made criminal, no?
Was that because of the pot, or the fact that it’s illegal? I was in the Army and Navy before there were drug tests, it changed just before I got out. I never saw a difference in how our ships performed. I would say that probably 50% of the E-5s and below used pot/hashish and if you looked at the difference between the senior enlisteds and lower ranks in a liberty line at 0200, the ones on their hands and knees puking, getting in fights and falling asleep, were the ones that were drunk, while those that got high, were laughing and eating.