Liberty and lawlessness (whether of the individual mind or the body public) cannot coexist. Weed is devastating Los Angeles and rotting the place in more ways than one.
Your reasoning is exactly that used to outlaw alcohol. How did that work out?
Meanwhile, the War on (Some) Drugs has had a devastating impact on almost every liberty imaginable. You literally cannot board a plane carrying more than $10,000 of cash without letting Uncke know, or it (not you) will be charged with committing a crime and taken from you. I will take a few people with no self control ruining their lives vs. destroying our liberties every single time. We’ve fought wars for that. Besides, addictive people will ALWAYS find a way to destroy themselves and negativiely impact the lives of those close to them.