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The dangers of relying on "consensus" instead of actual science.
well many confuse consensus for science
well, many don't know what science is, what scientific method is, and actual scientists.
They're the ones who are the first to say that "science is on my side" or "I believe in science"
The alternatives to stenting and surgery that this scientist recommends, in her own words, are:

"Major improvements can simply be made by medical – as opposed to procedural – interventions, such as the adoption of healthier lifestyles, anti-cholesterol drugs, taking blood pressure [drugs] and cutting out smoking.”

How are these "surgery alternatives" if the underlying cause is usually years of lifestyle choices? Is the doctor expected to tell patients to lose weight and quit smoking, and send them home? So much of medicine has this conundrum. Patients don't simply change as expected and they will also seek out treatment if none is offered otherwise.

People being lazy, is that Medicines problem?
It leads to them needing medical treatment so yeah it definitely is.
It's pretty fundamental that poor health is medicine's job to address, regardless of the origin or whether the person "deserves" to recover by some peoples' moral standards.
Should medical science only promote “get rich quick” surgical procedures and refuse to consider that “work hard first” lifestyle changes are effective for the vast majority of patients that work diligently towards health? No: lifestyle changes are a preventative and curative step that can avoid diseases and surgeries in many other fields.

Medicine is absolutely capable of demanding patients work diligently towards lifestyle changes before they receive surgical intervention. For example, if you want an organ transplant and you aren’t working diligently towards health (often with exactly the same list of lifestyle changes as above!) you may be denied your organ transplant.

The problem she fought against was that surgeons didn’t want to consider that the lifestyle changes method could possibly be effective. She was right; they were wrong.

So now it’s left to medicine to decide when and how to take that into account in their treatment recommendations and standards of care. As you describe, this is a Hard Problem, but it’s a familiar one. They already have lots of experience with treatment through lifestyle change, and now as a result of her work, they can apply those learning to this new area too.

Good work.

His/her point is that by the time most people see a doctor about a problem, it is too late for lifestyle changes to have an effect and that surgery is semi-urgently necessary.
Doctors know full well that exercise, diet, etc can drastically improve health. Do you really think they are willfully ignorant? They also know their patients that they told a hundred times to start exercising, etc. Now these patients have serious, life threatening conditions. You seem to deny reality and suggest that they finally convince their patients to get their act together when they're 65 years old and set in their ways. How's that working so far?
I was listening to a podcast with Shawn baker (I believe that was his name) who is an advocate for the carnivore diet. Besides describing all the strange and unusual remissions of autoimmune problems that people experience after switching to a carnivore diet, he gave an account of his journey leading up to becoming a diet luminary.

He tells some really interesting stories about being a surgeon in iraq and then his surgical practice in the United States. Being a man who values results, he began to recommend lifestyle and diet changes to his Patients, finding that sometimes it even made surgery unnecessary. And according to him this upset the hospital. He went on to explain the surgeries are very profitable for hospitals and that because of this they are over-prescribed. People are having unnecessary surgery all the time.

Ever since then I have been keeping my eye out for further evidence if this is true or not. It strikes me as plausible.