Prohibition didn't work in the 1920/30s, I don't know why or how anyone thought it would work in 1980 through to now, especially now when all the evidence is so strongly to contrary of it working.
I'll never understand the logic of pushing something that is inherently dangerous, especially when done wrong, into the most nefarious people in the population and asking them to be the arbiters of its distribution, in what other area of society does that sound like a good idea?
It's even weirder when you consider the amount of tax revenue that they're forfeiting by doing that, it's not just an idiotic idea from a health and safety perspective but also from a taxation and financial consideration. I mean are they really that inept?