@Aimless Ryan I feel for your pain. This is not what I use MJ for, so can only surmise about the benefits it brings you.
But I would say if 'heaven forbid', you couldn't take it anymore, unfortunately it would have been the pain that pushed you over the edge, not some crazed addiction to MJ and your inability to acquire some.
As many other have said, there are usually other contributing factors to why someone takes their life, and I don't believe , "I like weed, I can't score weed, think I'll kill myself" has ever been a motivator, or if it has, then I think the victim / patient had some other serious mental issues.
IMO many suicides are due to pain, be it physical or mental anguish, not because of dope.
Now could it be argued that MJ has saved lives of those on the edge, quite possibly, but I don't think MJ is a wonder anti-suicide drug either, a band aid on a broken leg is only superficial treatment.