This is a logical consequence of one's belief and one's love for humanity. If you know that there is a right path that will lead to eternal success and that all others will lead to the exact opposite, it is natural to let others know about it. But it is also needed for one's own protection. The results of our collective dereliction of responsibility in this matter are all around us to see today. The campaign launched internationally in the name of women's rights and gender equality, which has recently gained lot of momentum, is one example of this.
Equality is a slick and catchy slogan.
In mathematics if two variables are equal, one can be substituted for the other without changing the result in any way at all. If men and women are equal in this sense, then a woman can do anything a man can do and vice versa. You can substitute one for the other everywhere. Thus a woman can be a truck driver, a coal miner, a prison guard, or what have you. Similarly a man can become Mr. Mom, replacing the mother in taking care of the children.