Even if MJ usage is legal, it will remain a clandestine activity. Folks, for reasons, won't be strutting around in the general public saying "Care for a toke?" Their private sector jobs would be at risk, at the least. As well as opprobrium from family and friends.
I certainly know the difference between a MJ high and an alcohol high...that alcohol dwarfs MJ re anti-social behaviour, family problems, crime, and so forth. Little-known fact: during Prohibition, there was a marked decrease in what we now call domestic violence, in so-called petty crime.
If it is legalized, there will be a rush to fill the increased demand. Would there be government "suppliers?" Likely. Would it be a bureaucratic mess? Likely...there is no requirement for competence imposed upon government workers, nor any penalty for failure.
So the criminal supply network would jump for joy - the increased volume of sales would well make out over the current prices.
The thing I worry about, that with increased usage upon legalization, there undoubtedly will be more folks on the roadways under its' influence, there will be a problem for the businesses that we all need to earn out money.
Marijuana is very pleasurable. I know that. I hear the term "gateway drug". I don't think that's strictly true - but I do think you can get addicted to MJ - perhaps not physically, but certainly emotionally. It's entirely so, that it can make one's life be in stasis. And a pleasurable thrill being what it is, some move on to other substances. That's a fact.