We don't make alcohol and cigarette users  criminals, because they are addicts.
But we do make users of illicit drugs criminals. They have no legal path to exercise their bad choices.  
By our decisions as societal rule makers, we force them to meet the lowest criminals in the food chain on a daily basis. You can buy your beer cigarettes and food safely from a tax paying citizen. And the product you buy has met government sanctioned manufacturing and safety standards.
It seems as though you are unfamiliar with the term "self fulfilling prophesy"