Earlier quoted context omitted.
Really? How do you know, 'it hasn't stopped them.' How do you count the number of people who never got addicted to meth because it wasn't on sale at 7-11, or was never made the secret ingredient in McDonald's new meth burger. Do you know that without rules, there really are no rules, and the examples I just gave are the tip of a scary iceberg. Do you know what worse is? You have no idea.
We do have Prohibition - before, after, and during. Consumption went up during, and back down afterwards. Crime went up during, and back down afterwards.
From Wikipedia:
...Methamphetamine has a high potential for abuse and addiction, activating the psychological reward system by triggering a cascading release of dopamine in the brain characterized by Amphetamine /Stimulant psychosis.
Chronic abuse may also lead to post-withdrawal syndrome, a result of methamphetamine-induced neurotoxicity to dopaminergic neurons. Post-withdrawal syndrome can persist beyond the withdrawal period for months, and sometimes up to a year...
Got some junkie friends? I know a couple of them, burned and miserable lives mostly. On the other hand, all my drinking friends are quite normal, no addictions, no suffering from alcohol.