Earlier quoted context omitted.
Policy makers do put quite a lot of work into protecting us from alcohol, tobacco and over the counter meds. Also, 1200 people is a fairly huge study, plenty to get some quality statistics from. I'm not sure why you have been so offended by this research. It looks quite convincing to me, and fairly worrying.
The difference between how you're treated for consuming alcohol (which as far as I'm aware is objectively more dangerous - and more immediately so to other people - than marijuana) and for consuming marijuana in most places is pretty ridiculous, to the point of almost seeming like satire. Alcohol also has a pretty significant (don't think it's quite this significant, granted) effect on coronary health, not to mention…
Guess how easily you can get any drug.....even in prisons. If we can't keep drugs out of prison then what chance is there to keep it out of the general public?
The war on drugs is over. Drugs won. Legalize them all, provide accurate labeling, and tax it. There is nothing left to "debate".