jvossy

Then go find them and report back.

They're doctors, not CEOs. They are advising based on the behaviors they see from most of their patients, who probably come in asking for quick solutions and are unable to make lifestyle changes stick. Patients who are educated about their own conditions, willing to listen to advice, and able to keep to that advice over the long haul are a very small proportion. Not that doctors shouldn't offer this sort of advice anyway, I am just asking you to please try to understand why they behave in such a way.