No responsible person would assert that marijuana is a cure for anything. It's marketed as a pain reliever.
As most drugs are produced by the Pharmecutical Industry...
You've misread me.
MJ is a cure for nausea, which some treatments for other diseases bring about. For example, chemotherapy for cancer. People who throw up too much can die of starvation, loss of other meds, or choking to death on their own vomit. (The feds have killed at least one person in the last way by denying medical pot.)