Unlike alcohol, cannabis has important proven medical benefits. It's less addictive than benzodiazepines & other Big Pharma medications. By legalizing, you eliminate the criminal impetus involved with supply/demand of a beneficial medicinal herb, that needs to be legal. Tighten up alcohol & tobacco restrictions, but legalize marijuana. It makes ZERO sense to criminalize it's use, with so many more harmful substances freely available from liquor & pharmaceutical industries.