Not all of us define our marriage by past definitions Grennie. Calling a different view point to your own as BS isn't really very respectful.
Every day we get the opportunity to define ourselves and what we mean by x, whether that be marriage, relationships etc.
Marriage for the vast majority of women is a choice. Many people get married for the legal protection is brings for both men and women, as well as the religious, spiritual and other commitments it represents to them. Marriage does not have to be anti feminist, it does not have to be detrimental to either party, it does not have to define a persons' role in society, within their relationship or within their family.
I think we should be proud that men and women get to define their marriages how they see fit. Who are we to judge other people's happiness?With each day, month, years, generations the general consensus on marriage will change. We can see that with the potential introduction of gat marriage, the legal definition of marriage is change. So too with our ideas of what a marriage should be, roles etc.
But that change starts with people considering their own views. My grand parent's marriage spanned over 50 years, my aunty's too - they role in their relationship was based on their relative strengths and weaknesses, their personality traits.. not on 'traditional' gender roles. The older generations in my family did not define their marriages by cultural norms, they defined it themselves. And made their marriages work, and they were loved, content, happy and felt achievement in making their marriages work. They even were proud. Who are we to judge what people are proud about?