This is true, but if you think in terms of evolution and natural selection we should be biologically inclined to have certain desires that motivate us to have children above other desires. "Meaning" is more of a creative term, but in actuality much of how we behave is dictated by biology.
For biological inclination, a sex drive is all that's required to ensure children are produced. Biology doesn't care if you are happy or not afterwards.
A bit of interesting off-topic : I think its a disservice to general knowledge propagation to use personification when taking about systems. People can care, biology and systems in general cannot, they simply have consequences. I blame Richard Dawkins for this (and his very badly titled Selfish Gene)
Caring is part of the system. It is an aspect of the system that only exists because of the system itself. To refuse to analyze this is basically lying to yourself. EVERYTHING is a system.
The children must grow up and reproduce successfully. Not just you... but your children must reproduce as well, so thus you have instincts that shift to forwarding as much resources as possible towards your children.
