Written by a man.
No rational woman with any sense of dignity would shack up and reproduce with a man on the basis of an individual contract. It has no legitimacy, no respect, and NO OBJECTIVITY. If we are to discard the concept marriage, then we by definition have to look at them piecemeal, with no common principles to guide legal judgments with respect to them. So Mary's husband can make decisions for her when she gets ill - unless, of course, a family member sues and claims that Mary never intended that for this particular medical condition. And who is to say otherwise? It's just an individual contract, not a marriage. How can we know what Mary intended? We cannot assume wifely intentions. If we did, then it would be a marriage.