First of all, I'm not obese. Second, you lack reading comprehension. Third, you come across as a judgmental and unpleasant person.
It's obviously possible to lose weight with diet and exercise.
It is completely useless (scientifically) for a doctor to say, "Go exercise and lose weight." Same for other similar things, like weight loss and nutrition education. It's been proven over and over again in scientific literature that it doesn't affect outcomes at scale, every trial shows the same thing.
People know that they should eat less and exercise, saying it is not the issue.
For a non-scientific case study of 2 - I know one obese person who has had gastric surgery, and complication from it - it hasn't helped them, and one formally obese person who successfully lost 20kg and has kept it off. Consider perhaps that trial participants may in some sense be self-selected from the sector of the population for whom normal diets don't work.
fwiw... the latter person strongly recommended deleting all sugar from the diet.
"First of all, I'm not obese. Second, you lack reading comprehension. Third, you come across as a judgmental and unpleasant person."
I never said you were obese, I said this is the attitude of some obese people. Not the same thing, so maybe reading comprehension is something you need a little bit of help with.
Judgmental? Probably a little...As someone who lost over 100lbs and has kept it off for over a decade the old fashioned way...exercise and portion control...hearing people make excuses for why they cannot do the same gets kind of lame after a while.
It is the attitude of most people who have tried to lose significant weight (tens of kg).
Note that I personally don't think surgery or semaglutides are a great solution, since they still don't attack or even try to identify the roots of the issue.