Right now government marriage mostly assures that the man will be utterly plundered and ruined financially if the marriage ends. He can be husband of the year, but if she wakes up and decides to leave for ANY reason she dreams up, he is utterly raped by the courts.
Government leaving marriage might help restore that balance. It also might help people refocus onto the idea of Marriage as a religious sacrament rather than as a government event.
Family Court, I like to call bankrupt men court.