Getting them to look at this issue rationally implies they are capable of rational thought on this issue. They're not. I was an activist for some time on this issue, covering all drugs but focussing on pot in particular. Drug warriors do not think rationally, they're on a moral crusade to rid the world of evil, which they've equated with drugs that don't have Pfizer or other pharmcutical company names on them. That's why even the creatine isn't safe.
I'm even skeptical we can make progress in a decade or two just be educating the young, because keep in mind the generation in office pushing the drug war now were the same people smoking up by the ton in the sixties and seventies. They know, and they don't care.