Men and women are not treated equally in society. We are taught about social gender norms from the moment we are born and these differences generate inequality in various ways.
Women are still seen as weaker, more emotional, and are rewarded for good looks rather than intellect. On the other hand, men are encouraged to be tough, emotionless, and are rewarded for intellect/wealth over looks.
These things are 'learned' through interaction with others, through media representations, through school, work or family. These stereotypical ideas about gender constrain both men and women. For example, men are taught to repress emotions, to show leadership, to take risks. Why? Because being emotional/ weak/ scared are 'feminine' traits and therefore less desirable. As long as "femininity" remains associated with traits that people consider to be inferior, then we do not have gender equality.
Of course, I do not mean to say that EVERYONE conforms to these gender norms, or that EVERYONE treats others in accordance with these norms, but this stereotypical gender conditioning is very much present all around us.