I think a large motivator for having children is that it "validates" the lives and works of the parents. To have and maintain a family is saying to society "Look, I made it!" Unfortunately, for a large amount of parents, they give little thought on how to manage their lives around raising the child, the genuine sacrifice a good upbringing entails. Of course, all parents start of not knowing what they're doing, but learn along the way. Yet we have very misguided ideas of what having children will be like. We either expect them to be copies of the parents and/or for the educational system to completely deal with raising them, allowing them to be convenient trophies of perceived success.
Despite the horrific climate of our current world, both economically and environmentally, I think it is possible to provide a "good" upbringing for a child. Again, it requires immense sacrifice. My case for example. My parents were both poor, they divorced, I had a lot of trouble and trauma throughout my life and suffered for *BUT* I got the education I needed (special needs, which is a fight to get) because one of my parents worked hard and made their *life's work" my upbringing. Now, they did (and are still doing) a LOT of things WRONG, but I got ahead of the majority of kids because my one parent fought for the right education and (I cannot stress this enough) taught me to read at a very young age. My parent did, not the teachers, my parent. If you overtly rely on teachers to teach literacy to your kids with no work from you, your kid will either be illiterate or will struggle vastly through school. When you have kids, they become your life's work. Anything else is irresponsibility.
I went off a bit of a tangent there, I'm sorry for that, I felt it needed to be said. (I used "parent" because I did not want to disclose any unneeded info)