In my experience that’s wildly inaccurate. Dietary choices, weight loss, exercise, etc are often given as an effective means of avoiding and or controlling a wide range of conditions.

People are instead blowing off such advice because they don’t want to hear it.

I never knew Kaiser Permanente was so "anti-establishment" but I get pages of recommendations for healthy eating and exercise every time I go and also randomly as part of my "Personal Action Plan".