None of the DINKs I know have expressed regret over not having had kids though one couple did decide to have a child and got divorced not long after he was born

None of the DINKs I know have expressed regret over not having had kids though one couple did decide to have a child and got divorced not long after he was born. It changed the dynamic of their relationship and it no longer worked. I do wonder if DINKs have higher or lower divorce rates during childrearing years. I've known many couples who divorced after the kids got out on their own. They weren't staying together "for the sake of the kids" but raising children together was something that bound them together in a common mission. Once the kids were out on their own and established in their lives, the parents found they didn't have much in common and had different ideas on how to spend the rest of their lives. Do DINKs find their own common purpose that keeps them together or do they have a different relationship structure that really doesn't need one?