I know plenty of music PhDs who are not doing much. I am not talking about just Koreans, but Korean piano players seem to share the fate the most. Out of 10s of Korean PhDs in piano I have seen in the past 20 years, only two have become a professor in Korea.
>그눔의 박사가 뭔지…피아노만 잘치지. 모자르트도 박사 아니엇다.
Usually, Korean people who do PhD in music are not the greatest performers.