Because the labor market is too much stress for a woman. She is better in home calm doing the things of women. Just see how suicides and emotional problems among women have hit a record high the more they entered the world of men. Women who work outside home are much more likely to get depressed, attempt suicide, suffer from addictions and cheat on their husbands than women who stay home. This is because women are weaker and not prepared for so much stress. Accept it. If women were as strong as men, how could you explain that FEMALE sports teams have all MALE coaches ? (I noticed this in olympics LOL)