Holy assumptions superman.
You're initial argument was assumption central. I think you and I both realize what a strong family unit meant for women in the 1950's and 60's in America. And quite frankly, you sound like an 80 year old. Let me explain things to you: This thread is about sexism in America in the 50's and 60's, and is most likely trying not to portray it as having been a good thing. Your argument then went along the lines of, at least the family was stronger and children were raised well. In this threads context, one would easily make a connection between your point: strong family unit important, and sexism. So, your argument being in this thread, means that you would say that sexism is totally fine as long as the family unit is strong.
You left no regard for the fact that women were treated incredibly poorly. A strong family unit in no way automatically results in having well raised children. Your argument is based entirely on that assumption. My argument is simply: If a child is raised in a family where the father is expected to work and the mother is expected to take care of domestic work, that child will have trouble doing away with those expectations. Those expectations would clearly result in sexism.