I don't know how people can say that - it definitely takes extra time. Ferrying them to different extra-curricular activities (all of them don't have to like the same thing), teaching at home/different homework, the constant fights. Cooking for 4 instead of 1 may not make a big difference but the extra dishes don't wash themselves. I'm not even getting into additional parent teacher meetings, doctor's appointments and so on.
on reddit they seem to be fixated on the "korean women needs to be liberated by chivalrous white male no wonder korean women dont want to marry korean men"