I agree.
The marriage vow should be taken more seriously than a typical contract, but since the advent of no-fault divorce it is taken far less seriously. In fact, a prenup is taken much more seriously than the marriage itself. Something odd about that.
I believe you are married until death of a partner. I view divorce as an attempt to break a vow which was vowed to only be broken once dead.
We commonly vow only two things as Christians. First, we make a vow/covenant with God through Christ in accepting and following Christ as our Savior. Second, we vow/covenant to our spouse.
It says a lot about a person when they attempt to break their vows.