So since that is true of nearly every society on earth, does that make the world societally insane or sane?
Drugs were made illegal because ”they were thought to be dangerous to the establishment” in the form of African-American and civil liberties activists, both of which were easy to label stereotypical drug users with a bout of fictitious press.
Another political reason was the historically open international trade which did end up with the Opium Wars in China — but that precedent was used as a propaganda tool first and foremost, since the real reason for the war was not opium, but Great Britain’s heavy-handed imperialist approach to trade.
The irony is that these conventions are enforced with a similarly heavy hand and with equally imperialist policy behind it.