Preventative medicine is well understood and widely available. People just aren't interested or unresponsive to treatment.

This. I know a doctor who was heading the liver transplant list. Patients would come in, be diagnosed and told they need to live healthier, do this and do that as part of the preventative measures. Clear medical advice. Habitual change is the hardest in my view and this is also how this story continues. Over the course of time these patients will visit regularly. Their condition is worsening and the preventative medical advice will be stronger and more urgent. In the end most still end in the transplant list. Most having exhibited little effort to turn their life around.

When it becomes evident that "clear medical advice" isn't working, then maybe we should dig another level deeper and find out WHY it isn't working. Shifting the blame to the patients when you have most that are failing is, in my opinion, bad medicine.

At some point an issue is no longer a medical problem with medical solutions.

For example, drunk driving or shootings aren't medical problems, but cause them