There should be a button that states: in some cases.
I can only say that every person is different, and the treatment can vary. What works for one, may or may not work for another. For me, cannabis has indeed been helpful. It helps me to deal with my symptoms (especially the eating disorders) and my physical pain- headaches, post trauma shoulder, neck and back pain, gasteroenterology, etc . It helps me when my mood is dark- it brings some light back into my life. However, while I am not in the states I do not have that resource- Germany is not the same as California, especially as an expat. And I manage my symptoms with other (just as) natural treatments.
It is a good topic that I have not seen much discussion about.