Wrong again on most counts. Heart patients do indeed die in their sleep at age 84, same with cancer patients.
They can die in their sleep JLM, so can anybody. However many times cancer or heart patients suffer unspeakable agonies, unbearable pain. And that is even with proper medication. They can die painful, lingering death, even with treatment. That doesn’t happen with diabetes. With proper care and insulin, a diabetic does not suffer any symptoms, he can almost always live a normal life. Same cannot be said of cancer or heart attack.
So I wouldn’t call diabetes a disease.