People tend to prefer the easier solution. In this case, most people would simply look elsewhere for partners. No real advantage in violence or crime, since that has a cost for men. I mean, men also value their money, their safety and all that. At the end of the day, may people who preach "tribal", goes on to live at a mansion if they get enough money.

And people with resources and money have interest in keeping things safe (mostly for themselves). In practice, it is unlikely that singlehood would create violence and crime. It is more likely that it would create more hookups and that's it.