“Who enforces the promises of marriage if not an outside party?”
The individuals themselves, and the social integration of their church. Are you a Christian? Where do you read in the Bible that the government should “enforce marriage”? What do you even mean by that? Adultery is no longer a crime.
The government has already stepped away from the position of holy matrimony enforcement by allowing easy divorce and making adultery legal. If you want to get back to the position before those changes then fine I can appreciate that. But as it stands now you have a secular government who cares not a damn about marriage in charge of it. That is insane. They have no business tinkering with marriage, and we should not accept their authority over it.
I hope this change in NH passes. It might just do this time. But knowing a little about NH it may very well not do. And even if it does eventually they’ll force it through. Better to take it out of their hands all together.
In other words, you're saying a man can marry a woman, bear several children with her, and just walk away with no commitment when the woman and children are dependent on his income? No one can hold him to it? What obligations does he have? Who says so?
Marriages have been legally binding for a long, long, long time. Not just within a church community.
Nothing wrong with it, either.