According to the law De Facto is defined as the practices that actual happen in reality and may not be considered in terms of laws and regulation. The are extracted from the common practices happening and personal choices .
De Facto does not usually qualifies for formal standards and laws and this separates them from actions that comes under official category rather they are personal choice of people.
Yes, because being a minority isn't about how much of them there are, it's about social power. And women are below men in "social power," which makes them a minority.