Well Dawg, if I put myself in WAW's shoes -- which, I think, seems only fair -- I would say that the hassle, pain, recrimination, guilt, etc., associated with divorcing -- and here I think we have to (we LBS) at least acknowledge the possibility (though I would say probability, cf @Greek) that WAS feels all those things (Monsoor perhaps excepted, h/t @aliveandkicking), and that those feelings are every bit as real as "ours" are -- is every bit as yucky as we think it is, but that the outcome, Not-Marriage remains desirable.
Example: When then-not-yet-Mrs. SP was going through all that bridezilla/wedding-planning insanity, Myself became so frustrated with endless iterations of seating charts and cake decor that one day I threw up my hands and said, "Look -- just tell me when and where to show up and what to wear."
I didn't want to be going through the process of marrying anymore -- I just wanted to be married.
So now, with the Mrsses Dog and Person, same thing, only in reverse.