Sure, but that's irrelevant. Just because one thing is legal doesn't mean the other should me. Maybe cigarettes should be illegal, that's the direction the law should go in, not the other way around. The law exists to keep order and peace, but also to protect the more vulnerable members of society. Until weed can be proven to be harmless almost 100% it should stay illegal, I've seen too many of my friends become social recluses with little to no prospects due to their addiction, and I see no need to risk this happening to more people, plus the increased availability it would lead to for young people just so some portion of the population can get high, seems selfish to me.