I can't speak for doctors everywhere but in my experience doctors are not trying to push bariatric surgery on people who doesn't need it. If anything they're gatekeeping that as well since some people mistakenly believe it to be an easy way of doing weight loss. The doctors I speak of are all operating inside a public healthcare system though and I'm sure things are different at private clinics where people pay money up front themselves.

Someone near and dear to me recently had bariatric surgery after a years-long process of tests and assessments. Although it has a lot of nasty side effects their quality of life has improved immensely. They're able to move around freely in ways they couldn't before, their body doesn't hurt all the time, they are mostly rid of their painful oedemas, their self-image has improved incredibly and their chance of living to know their potential grandchildren has increased significantly.