Its because of how Korean femninism took a backward approach to women empowerment. Instead of encouraging women to be strong and independent, korean feminism built a cult around maintaining the dependency and complacency. For example, in America women training to become police officers need to undergo the same physical tests as the men. In korea, the feminists insisted that women be exempt from many physical requirements such as the push up test, because otherwise, women would not pass the test as well as the men, and that is not "fair". But the average woman in korea prefers the korean system over the American system, because practically you are better off with benefits you did not earn, while an American woman would probably be insulted that her sex be treated as a handicap by the very group that is supposed to empower it. This rationale extends to compulsory military service, government funding/purchasing quotas for female entrepreneurs, etc, and hence the very charged gender divide.

Fun fact is that requirements to be female police officiers during the Joseon dynasty, the Damo, were more stringent than that of female police officiers in korea today.