There are a lot more men in senior government positions and generally in politics than there are women. The same applies in the world of business few companies would trust women in senior positions such as CEOs.
Men are physically tougher than women though this doesn't mean much in the modern world where machine do most of the physical work. Otherwise women are not capable of meeting physically demanding tasks such as chopping down trees or laying bricks. So they were excused from such chores.