Why does that matter if they don't marry anyone? They control the means of reproduction, after all.
Whether they have a marriage certificate might not matter, but the stats are clear that children raised by single moms are correlated with a lot of bad outcomes including far more likely to end up victims of the prison industrial complex. If you only give a shit about yourself and not your offspring, maybe that doesn't matter
Cool, child support and alimony optional now. Right? Because it's always easy to be independent with OPM. People forget single moms became far more practiced after the state incentivized breaking up families.