The printing press is a very new invention in our universe. Before then books were for the rich. Often too history is written by the victors and so it missing a lot of important details that might or might not matter.
Come to think of it intelligent life such as could write books seems to be new. (but we have no ability to detect life elsewhere if it exists so who knows)
As a parent, most of the worry is just unreasonable fear. If you want kids have them. Sure they are expensive, but they will take so much time you won’t be able to do a lot of the other things you were spending money on before. I find it well worth the costs (this is of course a matter of opinion)