If a doctor prescribes you with a medicinal marijuana card; NOBODY has the right to tell you that you don't need it.
There are hundreds of medicinal reason to smoke marijuana.
I have a few
I have autism and it results in a severe learning disorder. In summary; I can't concentrate on homework. I have to stand up and walk around for 10 minutes after 5 minutes of homework. After a joint or a couple hits from the bong; I can go 8 hours of straight uninterrupted homework.
About a year ago now; I got rear-ended by a car going at 30 mph into the car in front of me. It messed up my spine and now I suffer from chronic back pain and I'm constantly throwing out my back. Marijuana stops this pain COMPLETELY. Anti-inflammatory drugs just make me feel sick and don't cure any pain whatsoever.
Ever since I was a kid; I've had diarrhea every other day and constipation the others. I've tried changing my diet, taking fiber, diarrhea medicine, but nothing completely fixes the problem. When I take marijuana for a day or so, my shit doesn't rip my rear open or explode like mentos in a Coke-Cola bottle.
Just because I enjoy the high, doesn't mean I don't have medicinal uses for it.