several studies show that women are different in many ways... (to name a few)
Men: are usually more task-orientated, less talkative, more isolated, better ability to perceive spatial dynamics (mentally rotating objects), have a fight or flight reaction to stress, men usually have a larger muscle mass and are less perceptive to pain.
Women: Are more verbalized about their emotions, pick up body language better, better mathematical abilities, women use a "tend and befriend" tactic to fight stress, have a larger deep limbic system than men making them better caregivers, and perceive pain at a much higher scale.
I am not saying this is the list of what ALL men and ALL women are like, obviously we all know a guy is really good at math, or a women who is way buff and muscular, but this is the overall difference between men and women that is shared by the great majority. You cannot say that these differences don't matter, they distinguished how we perceive the world around us and build up our identities.