I also think its important to mention that children bring happiness in the immediate. They bring joy here and now. And not just joy but a sense of purpose and a greater understanding of the human experience. If it were the case that your life was more fulfilling without children all the way up to the nursing home a good argument could be made it was worth it not reproducing.

I don't think that is true though.

I don't believe you can fully mature as a human until you've had children. Not mentally anyway.