I find this difficult to swallow. Alcohol prohibition was a widely acknowledged disaster (or does this collective memory also count as “social support”?).
Yes it was a disaster—because of alcohol’s widespread social support, that led to the black market, inability to enforce, etc.
Hence my statement
If alcohol didn’t have the social support it does, it would … be banned, or … need a prescription.
You also said:
I doubt most people are worried even subconsciously about the reintroduction of prohibition. Why postulate a coordinated social response to such a non-threat?
There are many measures short of prohibition that restrict alcohol. In trying to impose them, as society imposes restrictions on mind-altering substances, legislatures butt up against the social support for alcohol. Retaining this support is necessary for preventing these (otherwise reasonable) restrictions on alcohol.
Yes it was a disaster—because of alcohol’s widespread social support, that led to the black market, inability to enforce, etc.
Hence my statement
You also said:
There are many measures short of prohibition that restrict alcohol. In trying to impose them, as society imposes restrictions on mind-altering substances, legislatures butt up against the social support for alcohol. Retaining this support is necessary for preventing these (otherwise reasonable) restrictions on alcohol.