I'm asking because I really don't know.... Is there truly anyone for whom diet and exercise won't work and therefore they have to have weight loss surgery in order to lose weight? The point of weight loss surgery is to physically limit the amount of food one can take in. Food can also be limited just by not eating it. So why is surgery needed? FTR - I know of 2 people that have had weight loss surgery. One died a few days later in the hospital and the other doesn't look like he's lost any weight (he may have actually lost weight but to my eye he looks about the same size).