I am legally married because I need the legal and financial benefits that marriage provides in my country. However, in an ideal fantasy world, I wouldn't need those benefits and I wouldn't be legally married. But I would still be married! Just without government involvement. (BTW I have no interest in raising kids.)
It's normal for people to hear "marriage" and think "legal marriage" but I hate that.
Can you clarify what you mean by "need," here? In particular, does it mean something different than "benefit from"?
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.