P.S. From your label, I guess you've had more than your share of bad medical advice and treatment.
I've been through some of that indirectly. My awesome wife has had years of physician induced ailments and a victim of 'treat the symptom and/or blame the patient". She's was misdiagnosed as "per-diabetic" blamed on "obesity" because a woman of a certain age who's BMI fell into a range on a chart had blood sugar regulation issues must be - but wasn't. After a dozen docs, one sent her do an endocrinologist who said "nope not that" and figured out it was something else for which there are no drugs so sorry, can't help (but at least got her off the harmful drugs).
Recently she found a doc who has been reading recent literature on "obesity" that indicates in many people it's not about lifestyle choices or diet. My wife is not obese (except by an meaningless metric) nor in poor physical condition - exercises regularly, can do a 5 mile walk in a day, etc. But she's been trying to lose weight for decades, since her pregnancy (28 years ago). Every diet fails.
Well now in a research study. Based on metrics like blood chemistry, and empirical methods (trial and error and try something else) has figured out that all the "diet" advice she'd been given, and followed, was doing here harm. In particular, low fat and low sodium is very, very bad for some people (most people it seems from the research).
She now is on a high fat diet, moderate protein. And taking sodium supplements. Blood chemistry much better and more stable. Higher fat reduced her "bad numbers" dramatically. Body wise, exercise is easier (less fatigue) and body fat slowly coming down. All it took was the complete opposite of what every doctor had told her up until now.
I can't help but think there are millions of people out there who are suffering because of myths and misinformation thinking it's their fault even though they "try" (meaning do what the experts tell them, low fat, low carb, low salt, etc).