Americans think that warrantless NSA wiretapping is constitutional.
This is false. They decriminalized use, but not production or sale, which is the side of the market that actually matters if you're trying to properly align incentives. Alcohol and cigarettes aren't not laced with fentanyl out of the benevolence of the brewers and tobacconists, rather because they have reputations in the legal market that enforces quality. This simple market mechanism is removed when you force an industry underground. It is not an accident that neither before nor after, but only during prohibition was there a non trivial chance booze would make you blind.