Think about the world a generation from now. A sizable portion of the population comes from medium or large-sized families. The adults have kids, nieces, nephews, young cousins. Another portion of the population is childless. Disproportionately, they are only children. No nephews, no nieces. Maybe no younger cousins.
There will be a big difference in priorities. There will also be different standards. Much of our ideas of public decency have to do with what we do or don’t want children seeing. If you don’t think, or care, much about children, you’ll have different standards.
It’ll be a cause of tension in the future. I don’t know what problems will arise along that tension line, but they could be big ones.