The family plans its future around the boys. These differences, marked from childhood, are consolidated during their youth. As they grow up, girls and boys are separated. Young women are isolated and encouraged to remain in the shade. They prepare themselves and wait for a man to choose them, a husband who they will have to serve.
Young men marry, form a family and have a wife as a servant.
This is the only way in which they understand life. The father possesses a wife and children, this is the only thing he has. He cannot offer his children a better future. Men believe that women are incapable of doing anything well by themselves. This isn't an individual opinion but a social prejudice.