Situation A: Couple without kid---how does it matter whether the couple broke up or stayed together--it is merely a breaking of live-in relation.
Situation B: Couple with young kids-- This is where divorce hurts the kids. So the couple must confirm their union steadily before having kid. This situation is no good as has been proven by several sociological research.
Situation C: Couple having grown up kids: Again how does it matter if they decide for a change..