What's your point? We regulated cigarettes and now they have a tiny fraction of their former customer base, saving millions of lives. These are solvable problems.
Regulated but did not ban and the trick is to keep the availability far enough above the profitability of the criminal enterprise versus demand and your law enforcement potential.
Which technically isn't hard because criminal enterprise is pretty damn inefficient!
Cigarretes are an interesting example. Its way more about general society attitude, without doing a full baning. And that's likely what we need for other stuff.
We litearlly can't ban everything that is bad in the large. That would simply be to many things.
More like banning was applied to advertising and indoor smoking in lots of places.
>without doing a full baning.
This is why it worked, as good as it did.
That was enough regulation of the prominent, growing hazard & risk, for the vast majority to experience how much better it was than before, and usage snowballed downward as much as it could.