Justinian I: "If marriage results in lower taxes, certain legal rights over one another's person like hospital visitation, and fair divorce settlements, then the question for me is utility and whether there are alternative ways to accomplish the same thing."

There is: power of attorney.

Edited to add: I am also opposed to State sanction of marriage. Of course, I'm opposed to State sanction or intervention of /anything/, so this goes without saying. However, even as a "conservative Statist" I was opposed to the government's meddling in personal affairs.