A lot of people grew up seeing their parents divorce and feeling the consequences, and now they don’t want to get married because they fear that the relationship will end in divorce. That makes as much sense as saying “My parents bought a car and wrecked it, so I don’t ever want to buy a car. I’ll just rent a car instead.” If they fear having a failed relationship, then they should forego romantic relationships altogether because any relationship can end. It’s not as though it only hurts when it’s a legal marriage. The piece of paper doesn’t create the pain. But actually, getting married makes it more likely that the relationship will last because marriage entails a higher level of commitment and legal entanglements.

Perhaps the primary concern is not the ending of the relationship, but the ending of a relationship involving kids. If that’s the case, then they should not be avoiding marriage per se, but having children. If they don’t want kids, they can get “fixed.” Foregoing marriage because your parents’ marriage did not work out just doesn’t make sense.