Is it possible cannabis is both medicinally useful and gets people high? What makes you think that these two properties are mutually exclusive?
My friend, if you're going to be against something, you must have a reason. When a person is for or against something just because they are is indicative of someone who has bought a bill of goods without checking the warehouse.
The medical marijuana argument seems to me a disingenuous argument to make society sense it benefits by letting potheads get high.
...Unless one subscribes to global warming, as the science determining the value of medical pot is about as viable.