Try selling pounds of it and tell me that it's only "technically" illegal. Or try being non-white, in which case your chances of being arrested for even personal-use amounts go way up. Or an ex-con failing their piss test on probation and going back to jail, or a manual laborer denied work-related injury insurance claims because they smoked a joint on the weekend. I know many people fucked over by the legal system over this drug that you seem to think is not actively prohibited.