I am also a Korean and wrote this on top of my head, though I do have to admit that it has been some time since I've been a student involved in it.
I'm mostly talking about 학종 where you submit 자소서 and 생기부(학생부?), and that there's been a ban on writing non-public education related experience on the latter. As for the claim that it being part of the government crackdown an hakwon, [here](https://www.yna.co.kr/view/AKR20100407138500004) is a source I found where they directly mention it. Ctrl+f for 사교육.
I'm mostly talking about 학종 where you submit 자소서 and 생기부(학생부?), and that there's been a ban on writing non-public education related experience on the latter. As for the claim that it being part of the government crackdown an hakwon, [here](https://www.yna.co.kr/view/AKR20100407138500004) is a source I found where they directly mention it. Ctrl+f for 사교육.