undrdg - I do get what you are saying, and my own sitch is somewhat an example of it.
My H and I were married for 15 years. I walked away. At first he and I both agreed to work on getting back together. But then, he just stopped pursuing that option, out of the blue, and about a year later we were divorced.
So what really happened was something like what you are describing. My H at first thought he wanted to keep me, stay married, "win me back" or whatever. But once he had a bit of his own freedom (with me moved out) and really reflected on our relationship, he decided he didn't want it any more either. He finally realized how unhappy he had also been during our marriage, and to be honest, I believe he was actually grateful that I had left, because even though he was unhappy he would have never left. He basically secretly hoped I would be the one to lower the boom, and I did finally. Then he got to be free of the "bad guy" title of being the one who left.
Now...I think only a portion of situations are like mine, while most others really could probably be divorce-busted. I guess it all depends on the "truth" in your sitch. The "truth" in my sitch was that my ex-H, the LBS, was just as unhappy as I was in our marriage and he chose to let it die when given the chance to revive it.
