The Korean beauty standards are considered high to Korean people because the features Koreans consider beautiful are not something many Koreans are born with.
For example, the Koreans prefer big eyes and sharp nose which are features that many Koreans do not have. If white people’s standard of beauty include small eyes and flat nose, then that standard would be considered high to white people, simply because many white people do not have those features.
Koreans live in a very competitive society and they keep striving for extremes instead of learning the art of moderation. That has taken a toll on them when it comes to the pressure of looking good till they have to succumb to plastic surgery. Even when applying for jobs, they are discriminated by their looks, so it almost becomes a necessity to have plastic surgery in order to have a normal life in Korea. The extremism in Korea seems to be at the point of no return now, unless it collapses in the future like some ancient civilizations. Almost all Korean idols look a certain way. Most of them may be conventionally attractive, but they don’t leave an impression because most of them look very similar to each other.