I don't care personally if people want the aesthetic (though I don't much care for it). As a social trend, that's something else. Socially, it's also about putting women on a constant treadmill to keep their looks, which isn't possible, and you don't know you've crossed the line into unnatural till you've done it. Cosmetic surgery is a business.
what concerns me, though, is that good work is not cheap. But people are getting it cheaply, through various ways (non medically trained providers, or doctors who aren't really trained in the speciality they need to be, or going abroad). Cosmetic treatment is often poorly regulated. Even for surgery, yes, you need to be a doctor, but depending on the country you may not need to be trained in that specific field of surgery and it's up to the patient to make sure they are actually registered as a plastic or cosmetic surgeon. That is how you end up on Botched. Where, by the way, the human Ken doll went on, and of course they wouldn't touch him (they always put on a patient who the doctors won't go near, because they're surgery addicts.)
That's a recipe for poor results, and sometimes dangerous ones. I know someone who went abroad for weight loss surgery because she wasn't eligible on the NHS and of course it was cheaper there. She got really ill, and the NHS did wind up having to foot the bill for the repair. Or all the Brazilian butt lifts where they remove fat from your midsection and inject it into your arse, which apparently reputable American surgeons won't do, but you can certainly get them in Tijuana.
if you do fillers wrong, you can cause a significant autoimmune reaction. Especially if you're a right idiot and get silicone injected.
and yes, teeth need to be significantly ground down to put crowns on. If anything goes wrong after that, it's root canal if you're lucky and extraction if you're not. That was one thing since I was replacing mismatched and elderly crowns on top of multiple root canals, but I wouldn't do it to healthy teeth. For most people, braces and teeth whitening are a better choice; you just won't get instant results or blinding teeth.
At least hideous false eyelashes will come off with makeup remover.