it's actually pretty simple.

if you can smoke a bowl instead of taking a vicodin to relieve pain, or instead of some sleep drug to battle insomnia, then there's no reason why marijuana should not be prescribed to you. the truth is that this all natural plant is much better for us than some pills. (or many other things sold in stores every day with no problems)

as far as people taking advantage and using it just to get fucked up, that is the case with ANYTHING just because some kids like to get fucked up on cough syrup, doesn't mean we should make it illegal for sick people to buy that same cough syrup