>see weed.
I'm not sure what you mean by this, without further argument. Marijuana usage went up a couple percentage points in Colorado after legalization.
https://www.chicagotribune.com/news/ct-viz-met-colorado-lega...
Prohibition kinda works, kinda doesn't. I think it really depends. Banning something like alcohol that the vast majority of the population partakes in was very silly. Banning heroin? I'm not so sure it's as simple.