Without education, we are weaker economically. Without economic power, we are weaker in terms of national security. No great military power has ever remained so without great economic power.
Capitalism is not about free competitive choices among people who are reasonably equal in their buying and selling of economic power, it is about concentrating capital, concentrating economic power in very few hands using that power to trash everyone who gets in their way.
Population growth is straining the Earth's resources to the breaking point, and educating girls is the single most important factor in stabilizing that. That, plus helping women gain political and economic power and safeguarding their reproductive rights.
Once upon a time my political opponents honored me as possessing the fabulous intellectual and economic power by which I created a worldwide depression all by myself.
In Japan, full-time homemakers have no economic power of their own, and they socially lead a faceless, anonymous existence.