I'm from the school of 'do as thou wilt'. It's not for anybody to judge another person's 'suitability' for weight-loss surgery or anything else - that's up to the individual and their doctor to decide.
I may be biased, but I come from the perspective of someone who had 'unnecessary' surgery purely for myself and anybody who doesn't agree that I 'needed' or was a suitable candidate, can go jump ;) I'm a size 8/10 and until 7 weeks ago, had a size 14 midsection. I felt horrible. I looked about 7 months pregnant all the time. I couldn't bear for DH to see me naked and had to stick to wearing dresses instead of shirts and pants because I couldn't tuck my belly in. I couldn't even work out properly because if I stepped up for anything other than a brisk walk on my treadmill, my saggy belly shook and jiggled from side to side (like big boobs without a supportive bra) and it HURT. Friends and family told me I was being stupid, my body image was all in my head, told me I should feel good about myself as my body was a result of growing two healthy kids, that if I just did enough sit-ups and ate nothing but f-ing salads for months on end, I'd get my flat tummy back... but no.
Screw them and their opinions, I got a tummy tuck and I couldn't be happier! And no, I'm not sitting here watching every forkful I put in my mouth - I have my junk blowouts and love my food and have my 'off' days like everyone else where I just can't be bothered to watch my portion size. I paid a stupid amount of money but I have my life back, and even if people don't notice right away (I've lost another dress size after surgery purely from not wanting to eat and feeling uncomfortable while recovering), I don't care because I did it for ME. People can say, 'Oh, but you didn't even need it, why should you have had it when there are people out there who *really* need it' (whatever that means!), or believe that plastic/cosmetic surgery should only be available for truly 'needy' people (eg boob jobs for breast cancer patients only, plastic surgery for car crash survivors or burns victims who are disfigured etc), but I don't understand why anybody would think that way - like a burden they simply don't understand or relate to is somehow completely invalid and I should just 'put up with it' because someone out there is worse off than me?
So yes, I view weight-loss surgery very positively. If the individual in question is going into it as a 'quick fix' and isn't willing to work hard and change their whole life to get the best results, then that's their problem and the consequences of their actions will be theirs to bear. It doesn't affect me or anybody else. If someone thinks weight-loss surgery will be the 'kick start' they need to get them motivated to change those bad habits, then more power to them - my tummy tuck did the same for me. I was so miserable beforehand, I figured dieting and exercising could just go to hell because it wasn't going to change anything - and I know a lot of overweight people feel the same way. 'What's the point, I've tried and failed before, if I could *just* get this surgery to give me a head start it would be the catalyst for change'... and it certainly has been the case in my situation. Now that I can put on a pair of skinny jeans and not have a big gut hanging out, I find I do watch my diet more carefully and I do find those early-morning workouts easier to face with a smile because I can SEE the results and now I'm not just chasing a dream, I'm maintaining a reality - a much more powerful motivator imo.
I know a guy who got lap-banding surgery to help him tackle his morbid obesity. He's still morbidly obese and lives on Mars Bars and thickshakes. And that's his problem to deal with - he didn't use the opportunity wisely and HE will be paying the price with poor health and self-esteem. Not anybody else. I know others who have been given the same opportunity and found a whole new lease on life because they stepped up to the challenge and took it all on board - and they are reaping the benefits.
So I'm all for weight-loss surgery if that's what a person feels is an option for them. Whether they do it 'right' or not, whether they 'deserve' it or not, it's for the individual themselves to deal with.
Weight-loss surgery, like mine, certainly isn't minor. More power to those who can't (or just don't want to) fight a losing battle all on their own and are brave enough to go under the knife in order to free themselves from a lifetime of bad habits and misery and make such a huge change!
(And that's not to say that people who lose heaps of weight the 'traditional' way are weak or any 'less than' those who get weight-loss surgery, I am in absolute awe of those who can push on and on for so long and make huge lifestyle changes in order to be healthy - just that for many people, traditional doesn't work and they need to pursue other methods to achieve their goals... and it takes a lot of guts to go to such lengths to get there!)