And what if they are 50 and divorced with no kids? Would the OP say that’s the best or the worst situation, of the three? No harm done?
Hey, at least they had the experience of marriage, right? There are no children who might have suffered, but OTOH there is no “consolation prize” for the two people who might have been happy with other spouses, or who might have had children with other spouses, or who might have led happy single lives (even with getting gelilah or being called “Aunt” by everybody else’s kids).