The illegality of other drugs is a potent incentive in the healing process of addicts. It is significant that notwithstanding this, addicts have a high recidivism rate. That emphasizes how much more difficult recovery would be were drugs legal. The real goal is general legalization, as proponents well know. Their appeals to compassion are as false as their reasoning is flawed.
True compassion requires that the drugs remain illegal.
Society in legalizing them would do its members great harm. China in the 19th and early 20th centuries. Some folks are trying to camouflage ulterior motives. The truth is race can be a factor in redistricting. People drawing district lines are always aware of where people live and usually know their race and ethnicity.