Interesting choice of words: "concept of ownership". Maybe I'm coming from my personal beliefs and experiences (as I assume you are too, to some extent at least), but I don't see ownership in commitment.
Often balance is found between two extremes, and between restrictiveness akin to religious submission and no questions asked, there is a balance of trust and boundaries where long-lasting partnerships flourish.
Growing up the most successful relationships that I've seen had one thing in common -- being aware of the unwritten rules and staying true to them, while being so happily devoted to building, nurturing and protecting the unity that it never seems a threat to personal liberties.
I don't necessarily differ with you, and I'm glad your words are food for thought.