I haven't smoked anything for decades, but the current policy on weed and some other recreational drugs is not based on science but on prejudices of a few primarily American law enforcement officers from 30's - like Harry Anslinger - and bears a strong racist bias.
https://www.vice.com/amp/en_us/article/gyzjk3/there-are-no-hidden-dangers-to-weed-legalization
@nikolal You can legally drink yourself to death or die of tobacco-induced lung cancer, but you can't smoke or eat weed. That's too selective to be about personal freedom only.