I see no issue with plastic surgery - for reconstructive reasons, or simply cosmetic. Yes, it'd be a wonderful life and world if we all could shut off our insecurities and ignore superficial judgements, but we're human. If you change things about yourself, within reason, and safely- and it makes you feel better for the longterm - you're enhancing your quality of life. It's no one else's place to judge that. They can't possibly measure or understand another individual's definition for 'quality of life,' and it's obnoxious to assume one can.
Of course, extremes are always bad news. The motivation is key. If there's a serious psych disorder in the mix - body dysmorphic disorder, etc, surgeons need to exercise caution so that people don't endanger themselves repeatedly going under the knife.
I've had plastic surgery (reconstructive) a total of 5 times on my face to correct disfiguring scars from an infection that could've killed me. The original scars looked like someone had taken a large chisel & lobbed off hunks of my face. Some areas from the infection were still so chronically inflamed that they simply couldn't heal at all, and needed to be removed. The surgeon cut out the scar tissue & active areas, & simply brought the 2 new edges together to create new scars that were subtle, thin lines. I'm extremely happy with the results.
I do think there are some incompetent & unethical surgeons out there who upsell more procedures to their wealthy cosmetic patients. That's likely why you'll see someone who's had one too many facelifts (skin's too tight/shiny/brows too high, etc), or they've gotten a bunch of injections, which create the trout pout & pillow-face effect. It's unfortunate, so if you ever do explore cosmetic plastic surgery, it's probably wise to do research on the doctor - as well as set boundaries for what you want done, & do research yourself on what each procedure entails.
As far as cosmetic surgery goes - if I had tons of money to throw around on that - the only thing I could see myself correcting would be if I developed loose skin at the chin/neck/jawline. I'd just get it removed. My mom's begun to get that- she's 52 - but no one else in the family has it. She was also a longtime sunbather/smoker, though. And worked at a job where she spent a lot of time at a desk (apparently some new phenomenon my surgeon called 'computer face' is happening to younger people, due to constantly looking down - turkey neck/jowls are forming earlier in people). I've got good posture/hate the sun/never smoke, so I may never get that sort of ptosis. If I did, & I had the money, I'd correct it. Procedure is minimally invasive.
Beyond that, I couldn't see myself bothering. Injections seem like a waste of money, with a high likelihood of poor results. I don't like my nose (it seems bulbous at the end to me) - but I'd never alter it surgically due to the risks of a botched rhinoplasty. Fucking up your nose can ruin vocal resonance (for singing and stuff), breathing, sleeping.. just not worth it.
So.. yeah.. I've no moral qualms about plastic surgery. So long as the person getting it is in a healthy state at the time, & their surgeon is competent/ethical, then there's no issue in my mind.