I'm guessing you're American since you're assuming everywhere has the same crisis you do. From what I've read here (on Hacker News), you have plenty of systemic problems. I doubt blaming doctors is going to be the most useful course of action. But then, I don't really know. Perhaps all doctors in your country deliberately do things that are against patients' best-interests, and would continue to do so if patients actually wanted the best thing for them. Do your doctors really not suggest good diet and exercise as treatments for type 2 diabetes? I'd be very surprised if they don't.

Edit for clarification.