Frustration understood but...
Coffee is not a cure or even a treatment for diabetes. But it has a statistical correlation to a delay in the onset of diabetes. I am sorry about your mother. But if her love of coffee may have delayed the onset of this terrible disease by years, or maybe just months, isn't that worth investigating?
China faces the same epidemic as we do. I don't really care who finds the cure. I want it found. If the Chinese people/government/academia/capitalists want to spend money on this research, I say go for it.