Because why should girls have to go to school? You don't need an education, all the teaching you need will come from the Man who gets you pregnant, turning you into the perfect housewife and mother.
It's a life that is built for women, instead of trying to squeeze a weaker, less intelligent sex into the role of Men, so why not do what you're meant to?
Rights are for Men, so that other Men can operate within society properly and keep things functional. Men have rights, Men don't have udders.
Women have udders, these are big sacks of fat and milk that hang off a girl's chest, denoting her as an inferior breeding cow who lives to be impregnated and milked. Women have udders, women do not have rights.
Pregnancy after pregnancy, you'll become more anti-feminist, more misogynist, and even prouder to be a baby factory for patriarchal Men. Your Husband's friends all know that you live to pop out babies for him, your belly starting to swell again only months after giving birth to your last baby.
And to be a good woman, that's exactly what you need to be. Don't hide your desire to be a breeder, embrace it.