Surgery does not work for everyone.
First, doctors are reluctant to do surgery on people who weigh more than 400 lbs, lest the lungs of the patient collapse under the patient's own weight, while the patient is under anesthesia.
Second, people figure out how to eat past the surgery. They gain the weight back. The problem is in the person's brain, not in their digestive tract.
Super morbidly obese people need rehabilitation. I find that their treatment is often misguided. I had a super morbidly obese friend die at top weight 800 lbs. I saw numerous opportunities where he could have been saved, but medical personnel -- who were treating him improperly -- ultimately caused his death, when I feel that could have been avoided.
Here is a list of points that they apparently did not know.
Doctors kept treating the fungus that they saw there, while not adequately treating the bacteria, which were more dangerous.
He was in several rehab facilities specializing in bariatric patients, but none of those facilities had aquatherapy.