i'm not disagreeing with you. it'd be great if recreational use was a legitimate cause for prescription. i'm not sure why prescription of recreational drugs is that important, though. as i said, there are legal psychoactive drugs available sans prescription. i'd also argue that, in reality, prescription of drugs for recreational purposes does occur, e.g. erectile dysfunction drugs, birth control, and marijuana. recreational drugs are legally distributed by medical professionals simply under the guise of treating medical disorder. regardless, prescriptions are still simply not a license for unfettered consumption. they come with instructions for dosage and use, precisely for the reason that medical professionals have a vital role to play in the responsible use and prevention of abuse of medications. i don't think prescription really jives with recreational use. if anything, the recreational drugs you speak of should be available OTC at the discretion of pharmacists. indeed the trend is towards self-medication (or 'patient-role' in treatment). doctors are also not at all trained to prescribe psychoactive drugs for recreational reasons either. their 'prescription' should be the domain of a psychoactives expert, if anyone at all.
also, would such drugs ever ever fall under the PBS?
of course there are countless drugs with less toxicity and abuse potential. but the statistics on OTC drug abuse aren't really that overwhelming (e.g. 1-5% of cases of unintentional drug poisoning, 10-15% rate of abuse among drug court clients), particularly compared to prescription medicines. the culprit is generally ephedrine (phased out/more difficult to acquire), followed by DXM (still a big concern) and small number of antihistamines (chlorphenamine and dimenhydrinate in particular). so i don't really see why prescription is the real issue. drugs are going to be abused one way or another.
also marijuana isn't toxic