Abuse is worldwide, everywhere.
I grew up learning about many actresses, dancers and singers went through abuse inside the showbiz, both in the Western Asian country that I live in and in major English-speaking countries.
In my childhood there were many movies where the showbiz "big guys" tricked rookies and sold them to pimps, drugged them, raped them etc., partly why I'm not as surprised.
There are also songs I know, from US, talking about sexual abuse inside the showbiz. It's said 94% of women in Hollywood have been assaulted sexually somewhere in their careers. Lost in Hollywood, by System of a Down (Some lyrics are They look at you in disgusting ways, you should've never gone to Hollywood, you should've never trusted Hollywood). Also Kesha's song Praying is about the abuse that she was put through. I think it was her manager and he abused her repeatedly for years.
Does this sort of stuff actually happen to Asian idols?