Very true! But again, rights and responsibility cut both ways. If one half of the partnership can kill the child or make the other half pay for 18 years of support, the other half needs some sort of recourse.
The best path is the old fashioned rules, which were made to avoid this very problem.
This is why I tell parents teach both your children, sons and daughters to wait till marriage!! Do you want your son paying 18 years of child support over a “one night stand”? Then teach him to wait till marriage, to a woman he wants children with! Why is this so hard to do? We drill this into girls but not boys?