If you were told that you need an operation and your risk of serious complications was 50%, but there was a drug that could halve that risk, you would expect to be given that drug, wouldn't you?
That is exactly what is happening here. Except that instead of swallowing a pill, the answer lies in denying yourself those extra calories, climbing the stairs instead of getting the lift, walking at a pace instead of dawdling, getting out of breath and sweaty as you walk, perhaps even running if you can manage. That's the reality. Because by the time you've got to the point that you have to have surgery, or die, and an anaesthetist is telling you that you may very well not wake up or may well have long lasting complications, your chance to alter your risk factors is gone. And once you've had the surgery, all the medical teams can do is deal with complications as they arise.
Some people get lucky. Some people have all the risk factors and still sail through. Others get severe complications that last for the rest of their lives and even if they do then lose weight, the damage remains.
If people could just take a minute to think about why there is such a drive to reduce obesity, they might see that it has nothing to do with prejudice and discrimination and everything to do with the fact that it is quite literally killing people.