Get some professional information about marijuana before you are so confident about what you are stating. Did you know that smoking marijuana deposits 4 times the amount of tar into your lungs than a tobacco cigarette? Along with that marijuana actually contains a mind-altering drug called THC, which is bad for not just the nervous system but your circulatory system as well. Edit: I can give you some credit for the source, but it still does impair your mind which can score you DUIs just like alcohol. It is generally not the greatest because of the content of THC produced. Even if people only use it medically by ingestion, legalizing it will also allow smokers to purchase joints like cigs, making impairment problems on roads and some other issues that a government would not want to deal with.