Then what's the sense...this is what they will do.
No they won’t... It’s not “they”, the one who moves out is at fault and as the at fault party won’t get their share of the loot. Since it is almost always the woman who initiates the no-fault, often with the expectation of getting the loot, I think this would have a dramatic effect on the divorce rate.
The sense comes into play as these lawmakers realize that anything and everything they can do to slow down the breakup of the family (And America) is all good.