Human beings have been aware of the psychoactive properties of marijuana and were enjoying them before and during the entire lifespan of our civilization.
In fact, some form of most of the drugs being used today have some analogue that has accompanied us during our entire journey from the Savannah to now.
Yet our civilization exists. Despite all the drugs that will destroy it, according to anti-drug claims.
And the entire "war" has been a game of catch up the entire time. Whack a mole. Black markets are like that.
Prohibition tends to create more problems than the behavior it is adopted to prevent. Along with rich criminals.
Waste of time and energy, like arguing with authoritarian conservatives.