Bad argument. Alcohol is legal. Cops are not allowed to show up to work drunk. Drugs could be decriminalized, but not sanctified. For example, they wouldn't bust you for using drugs, but your employer could. You could snort all the coke you wanted, but to keep your job, your employer would still make you pee in a cup.
The effect of this would be lower crime. All the street gangs who finance themselves with drug sales would lose their major revenue source. The addicts who burglarize in order to finance their habits, would be in the same boat as cigarette addicts now, who can afford their drug without stealing my stereo.
Tax the product, and put the funds into treatment. Those who use finance their own treatment this way.
Well enough of this we wont make any converts here Keep your pipe dream.