all you can do as a parent is hope that you have done enough that your child has adequate skills to face the world ahead and, their eyes open so they can evaluate their surroundings and apply what they know, well.
I don't think that most parents can do those, at least in my country. I think stomach comes first, I can hear this from a dad/mum anytime "I am feeding 4 stomaches"
Therefore, I don't think that this dad or mum would prepare their children well for life, but the children would compulsorily prepare themselves on their own, as I did.
It is common most places I think. As long as the kid os fed, the job is done. I think there is more to it than that, especially now - and, even the type of food matters. A few weeks ago while Smallsteps was on the beach eating carrots and raisins, her friend was eating sweet biscuits as a meal - suffice to say, there was an obvious difference between the two.
Also, sometimes children of neglectful parents do very well, because they are able to learn what not to do in life :D