About 99% of us are either unambiguous genetic and anatomical males, or unambiguous, genetic and anatomical females. A very small number of people have true genetic and anatomical abnormalities, but we don't make law or construct culture based on these small and sometimes heartbreaking exceptions.
Having said that: some particulars of social masculinity and social femininity are just oddities of particular cultures, but ALL cultures have standards of masculine and feminine. MOST of them make sense, actually, because they are based on actual sexual differences, e.g. higher percentage of male body mass is bone and muscle, higher percentage of female body mass is soft organ and fat; male upper-body strength significantly greater than female; female baby-nurturing equipment (genital tract, mammary development, and sensitive responsiveness to certain faces and voices --- an aspect of attachment) is notably superior to males'. Etcetera.
Plan A: If you want to empower people to go with their strengths--- if you want to favor femininity in girls and masculinity in boys, they will tend to be, as a consequence, interdependent and complementary to each other. That's what happens when you strengthen male or female gender identity in children.
Plan B: If you want to get people who are autonomous singletons who are unwilling or unable to get into stable interdependent and complementary relationships, you will minimize gender identity in children.
Myself, I go for Plan A. I didn't used to believe this way. I used to be a convinced, ardent, activist, gender-averse feminist. But I was wrong. I think that what convinced me more than anything else, is becoming the mother of boys, glorious boys, and realizing that I could either go with their strengths, or crush them.
I chose to go with their strengths. I personally think this is good for the human race. Good for my boys, anyhow.
Good for you, Mom.
They have very sophisicated genetic tests now that can determine the sex of children born with ambiguous genitalia, so hopefully this will lessen the phenomena of "women feeling they are trapped in mens' bodies" and vice versa.