It's not even that. With decriminalization of adultery and introduction of no-fault divorce the civil marriage stopped being a contract between two people. It is now nothing other than a durable universal power of attorney revokable unilaterally and at will.
Ourside of the church, there is nothing left in the civil institution of marriage worth fighting for. I am glad that the prospect of gay civil "marriage" energizes so many people, but the real damage to the civil society was done decades ago in the West. The perpetrators were mostly straight.
Now that is a good way of putting it...durable universal power of attorney...there are a few extra benefits, but it certainly functions that way as long as no fault law is allowed ot exist.
You see the hunger for something better in the growing covenant marriage movement...