Do or do not. There is no "try". If you consume fewer calories then you expend then you are guaranteed to lose weight.

Oh I wasn't clear. I was just using the word "try" because you did in your previous reply. I totally agree with you. I think I said that in my original comment. That is unassailable. You are correct.

With respect to doctors and motivation though, do you think that I should not ask them for success stories?

If you're not really willing to take action then you can always find a plausible excuse about why it was too hard or outside your control. You can certainly ask doctors if you like but I can't imagine how their answers would make a difference.

I'm mainly looking for their successful treatment of others because that is a typical way to assess medical professionals. When a surgeon wants to perform a bypass, most people ask how successful that surgeon has been in the past.

I understand that you're saying that the doctor can't do anything if I'm so lazy that I find excuses all the time, but I don't feel like I have ever given a doctor an excuse. I feel like doctors give me excuses constantly about their success rates.

From my perspective, if they give the same advice to 100,000 people and of them they have 0 successful treatments by their own data, I'm going to assume I should find other advice

The advice is always going to be some variant of consuming fewer calories than you expend. Obviously the success rate is >0. Other than that I suspect you're just looking for reasons to argue instead of taking responsibility for your own choices.

I wish I found that a success rate is >0 to be so obvious, or else I wouldn't be asking the question.

Do you know anyone lifelong obese that has had a year or more of losing weight?