Yes. Supply reduction works in aggregate in almost all cases. Anyone that says otherwise only came to harm reduction via it being a liberal / progressive political talking point. I say this as someone that’s very left-wing and an overall believer in harm reduction. It’s just the way it’s espoused by Joe Citizen is dumbed down to the point where it’s just plain wrong.
If we legalised heroin, more people would do heroin. Gateway drugs are real. Decades of fighting against stupid Reagan-era drug policy have trained so many people to completely throw the baby out with the bathwater and brush the nuances of addiction under the rug in support of their cause, on both sides.
The argument in reality tends to be more that decriminalisation presents a net benefit literally by virtue of mitigating the criminal aspect.
I’d use drugs more than I do now if there was less of a legal disincentive. People that think they understand the tenants of harm reduction often hate to hear that, which I find absurd. It’s just…the truth. Usually I’m told “but you’re not the one we’re worried about” as if those with ‘serious’ drug addictions are somehow ‘other’. A ridiculously narrow view. There but for the grace of God go I.
I live in an area that saw drastically lower drug importations during COVID travel restrictions. We also had social policy that loaded loads of people up with money that kept everyone paid. We got to see first-hand the effects that supply reduction had on drug use, across the aggregate. There was an inarguable correlation. The issue is usually that policing action is just never that effective.