It seems like Korea has an extremely high beauty standard compared to other countries, and 'pretty privilege' is super real there. Your appearance changes how other people treat you to the extent of affecting your career prospects. And I think Korea also makes a lot of money from the beauty industry too, so there is financial incentive to promote visual ideals in k pop and plastic surgery, even if it affects individuals' mental health.

Does Korea really have more plastic surgery than other countries?
Um... These days, I think not only Korea but also other countries are obsessed with beauty
I think it's because of SNS. 
There are so many videos and posts that crave bbl, boobs jobs, and button noses. If you look at SNS, so many countries are obsessed with beauty.. not only in Korea.