This is a tough question with many variables. I was asked that question for this month's Secret Subject Swap and I have mixed feelings. From a purely personal standpoint I vacillate between "no" and "I don't care." Many of my friends have used or are using marijuana for medicinal purposes, and I applaud the health professionals who have helped them realize improvements especially in the area of pain control.
However, when someone pushing for legalization uses words like "cure" and "harmless" my antenna goes up. Drugs rarely, if ever, are a cure. And in all my years as a health coach, I have never heard of a harmless drug. They all have side effects. Even coffee! I find a lot of discrepancies in their arguments.