Would you have the op?
No, just carry on trying to eat sparingly, and hope for the best.
Yes, it's a chance for a new life, looking almost 'normal' (with your clothes on, anyway...
No way, it's all part of the demonisation of fat, and unlikely to do any good.
Take into consideration: You've spent most of your life on some kind of diet, but the best that ever happens seems to be that you get fatter a bit slower. Now that you're getting on, the obesity-related health problems are kicking in. You're so arthritic you can't do stairs or walk any distance.You're afraid you'll end up a total invalid, and/or die before your time.
If the op is a success, you could lose something like ten stone in a year. This might help your mobility,improve your longevity prospects, and you'll look better, as long as you don't take your clothes off and reveal the acres of drooping, flapping, crinkled skin...
On the other hand, you could be the one in a hundred who dies as a result. There's also the possibility of gruesome side effects,a rough recovery period, and the chance that despite having a stomach the size of an egg, you just won't lose weight. There's also the fact that food as one of life's pleasures will be over for you.You can't even have caffeine or fizzy drinks for ages, and you'll have to spend the rest of your days eating miniscule amounts of dreary, bland food as fuel.