Two points on that issue...
Dope smokers, are spotted because they drive too slow and over cautiously, it’s a long running joke-observation.
Secondarily, people who want to indulge in that sort of thing, will...(at least a Majority) prefer to stay home, and chill on their terms.
Third, using Prisons to shape policy is bad public policy, drug use is a public health issue.
Lastly God made grass...Man made Booze...who do you trust more?
Joking aside, from the Liberty side,the health side,the violent crime over territory side, the ability to regulate and tax side, the positives outweigh the negatives by a country mile.
And going 5 points...was intentional, for humor :-)