You're right though, any rich men will always target celebrities for their lust, no matter which country it is.
But I think Korea does it on the higher level. There are many ways to be celebrities though, not only going for audition to be used by talent agency. We are not living in early 90s or 2000s anymore, where Internet is limited. Next year is 2020, everyone can be someone today. There's youtube, upload your talent and people will realize how good you are and any music label will try to sign you, with your own terms and conditions.
The way koreans do it scare me though. Remember Krystal Jung and her sister? they were just 5 years old when they travelled to South Korea, and some talent agency spotted them and offer to be artist. I mean, wtf is this? they were just 5 years old and you already can tell their future?
Artists need freedom too. I really wish the best for Korean entertainment industry in the future. Agency is not the only way to be artist.