Mindless, irresponsiblee, stupid parents?
In days of old, when mankind lived in communities, children grew up in environments where parenting was an observed skill. They were also saw the parenting of all families not just their own.
In today's world, most of us don't grow up observing good parenting at close quarters. If we were lucky enough to have it, we will (hopefully) repeat it in our own families. If we don't, then we have no idea what good parenting is.
As only 5% of people read it's unlikely that most will go out and educate themselves on parenting skills.