The default assumption seems to be that boys will always fail to live up to girls in any form of studying. Because boys are rough, like games and fight, and girls are diligent and always listen.
It’s seriously hammered into children from the moment they go to kindergarden. It’s no surprise it’s some sort of self-fulfilling prophecy.
Pour a dysfunctional school system on top, and if you fail your middle school/high school/university entrance exams, your life is ruined.
If you get bullied in school, the teachers just look at you and say ‘eh, boys will be boys’.
I can see why some just nope out.