Ah, ah, ah -- you are not allowed to use the conclusion (that raising children is "one of the primary experiences of human life") as one of the steps in your argument.
That is not a conclusion, it's a given. The simple fact that you exist proves it more than I can otherwise demonstrate. But if you don't like kids, fine. I'm not trying to convince you to have them; just that you're missing out on something really big in the human experience.