Sure but your example illustrates the key point of the article, your marriage is much like a two-person island. Which is great, as long as you two each are happy and well-matched. But it becomes hell as soon as the match is unbalanced. Stresses once managed by a community are now loaded more and more on two-person islands. If everyone turns all their energy into their two-people island and leave no room to invest in community, marriage all of sudden becomes too necessary for survival. Again awesome when you're well matched but the very definition of hell if you aren't.

Debatable if all that is true, but it does seem like the increasing atomization of society affects the nature of marriage.