We didn't have a 30% illegitimacy rate in the past and tons of fatherless welfare families the taxpayers have to support.
I think part of this comes from mothers who are trying to relive their sexual past through their daughters.
Up until paternity tests were invented, it was pretty difficult to figure out who the actual father of a child was. Sure, we didn't have illegitimacy the way we do today, but don't fool yourself into thinking that women, even married women, weren't getting knocked up by men who they weren't married to.
We had shotgun weddings back then. If a man knocked up a girl before marriage (which was common) he was expected to marry her and provide. And if he didn't want to, he was persuaded nonethless (hence, the shotgun). A man would be ostricized if he simply knocked up a girl and abdicated any responsibility.
THat's because the taxpayers didn't support it.