Medical marijuana is legal in Colorado and I know a good deal of people with cards to obtain it. I have always been pro-legalization, but here are some thoughts on what I have seen by living in a state where it is looked at different.
Gateway drug? - This argument can be true in some sense, but not because of the drug itself. Marijuana is far less harmful in its effects vs alcohol, and contains no chemical that would make someone crave more powerful drugs. What causes "gateway drugs", is not the drug itself, its the element you are put into to obtain it. When you have to obtain something illegally, you are forced to surround yourself with people and situations where other drugs, crime or negative reinforcement occur. Just because someone enjoys pot, doesn't mean that they enjoy surrounding themselves by a criminal element. In fact, in Colorado, I have found that the legality of it allows people to discretely use marijuana and surround themselves with whichever crowd they feel is best for them. If alcohol was illegal, it would have this same gateway effects. So I would argue that there are no "Gateway drugs", rather "gateway situations". Legalizing it allows people to avoid having to surround themselves with an otherwise avoidable criminal element.
Health Reasons - This argument is BS. Find me someone that has overdosed on weed and I will show you a kitten that breathes fire. Marijuana is unique in this sense compared to most drugs, even legal ones. You probably know someone that has gotten severely sick or died from from legal drugs like pain medication, alcohol, cigarettes, etc.... but find me one person that had marijuana to directly blame for illness or death.
Then there are the benefits...
- Reduction in crime (drug dealers tend to sell illegal things)
- Reduction in marijuana trafficing and the effects that come with it.
- Reduction in prison costs
- Enormous tax generation
- cheap medication for a variety of illnesses compared to their "currently legal" counterparts.
Now, to answer the question that will undoubtably be asked ("Wont drug dealers only sell harder drugs now?"), the answer is yes. There will always be people that sell illicit drugs. The difference is that someone that smokes pot is no more likely to want illegal drugs than alcohol drinkers if it is legal. Not everyone that smokes pot is into the criminal element of it. The people that get caught up with hard drugs like cocaine, LCD, meth, etc will get into that stuff either way. They are into the criminal element, not marijuana in particular.