I think the easiest explanation is that they no longer enjoy the presence of each other, at least romantically (some divorcees remain good friends), and that the improvement in their life quality is worth the effort and fallout (if any) of a divorce.
To get deeper, there's the expectations they...
Ban, definitely not. Require tag currently, absolutely yes. Those who have a problem with them in terms of quality, your input is exactly what will result in stories indistinguishable from human-created in the future. There's no stopping it, only helping it in its early stages.