It's important not to get a big rock and hit yourself over the head with it until your skull is fractured. Jesus neglected that instruction.
Just conjecture here, but, it's part of the freedom that He gives us. We are free to turn our back on what is natural - marry the other sex, not have children and not hit our heads with rocks until our skull is fractured.
Then we can reap what we sow, with a fractured society and our brains running out our ears.
Okay, well you've all convinced me. I'm going to quit using the marketable skills that God gave me and not work anymore. And I'm going to ignore the fact that I don't want kids, and that my husband doesn't want kids, and just have them anyway. Then I'll be doing my duty to society. I won't be annoying anyone with my career goals. I can then be as self-righteous as all of you parents. I'm sure God will like me better, too.
(I'm not usually so sarcastic, but you people have driven me to the brink!)