Many kids out there are under-loved. Is it because their parents don't love them? No, I don't think so. I think they are consciously or unconsciously irritated by the very need of paying a lot of attention to their children. And attention is time, and time is — of course — money.
So, they don't have enough money to invest in the children, and children most of the time do not offer a quick ROI.
It's a bad investment tactic.