I dont understand why the groom walking ahead is so problematic. Even today, with our independence, I still rely on the men in my life (my father and my brothers) for help when needed. And that is the nature of relationships between males and females, females are physically weaker, its just how things are. And the men who are in a position to protect, it makes sense for them to be ahead. That is not to say that they don't rely on women, they do everything for the protection and needs of their wives, mothers, sisters, children. Reference:: Sikh Philosophy Network http://www.sikhphilosophy.net/new-to-sikhism/35580-bridegroom-walking-ahead.html
Thats just my perspective. When a woman's pregnant, she needs her husband's assistance physically to get around doesn't she? Its just how things are PHYSICALLY. If a person wants to read into it, from a feminist perspective, then you can come up with all sorts of things about how its about superiority or inferiority, and those would be true if the marriage is non-consensual or forced. If thats not the case then it just happens to be physical circumstance, REALITY.