I agree with you. If I am a woman, why would I want to do manly things? Wouldn't I want to promote those things that only women can do? Motherhood is the most amazing experience of my life. Wouldn't I feel like a more awesome woman to see my children grow up happy and well adjusted?
But wait, isn't that what makes a real man happy too? To see his children grow up happy, well-adjusted?
Isn't that what life is all about: to be happy? Happiness, I think, is harder to find outside a family.
Life is not a one player game. It is meant to be lived together.
There is nothing only a woman can do other than bear a child for somebody else. Men are parents too.