Only a problem if you are trying to maximize marriages, which does not seem like a good metric to maximize.
The rise of single parent households does seem like a legitimate issue to me. If the non marrieds aren't having kids fine, but if they end up having kids and then hating each other thats not.
The same trend applies to all forms of close relationship. So no, it is a problem if you want to maximize any form of social cohesion.
> The same trend applies to all forms of close relationship.