People love to claim that doctors don’t take fat patients seriously and complain when they tell them to loose weight.
In the Fediverse there are also some Nutjobs who will claim that being morbidly obese isn’t unhealthy and that those doctors just don’t have a clue if they think it is unhealthy
That’s why where I am from you usually need a clearance from a psychiatrist that there are no psychological issues in eating habits that would render that surgery useless, before the surgeon is allowed to do it