Yes, because the last few decades of drug prohibition have shown how differently it works nowadays.

I'm overly cynical about this particular matter though. Here in Ireland, the government recently introduced minimum unit pricing, selling it as a public health matter—completely ignoring the fact that about a decade ago they had suggested the same policy, but with the motivation that it would encourage people to go to pubs rather than drink at home (among many other moral problems with that bill).

Wikipedia says it was mostly about religious moralists.