Pretending that all those people have had equal success, or that poorer parents don't have a significantly worse time of it than more affluent groups is not helpful.
There is A LOT of child neglect here in the states, and plenty of children literally do not make it out alive.
True. It's also true that most children aren't neglected. The point I'm trying to make is most people raise most children decently in most circumstances. That you don't need to be rich to do so.
Vaguely related anecdote, an acquaintance was playing with his kids at a playground in Central Park and ended up chatting with DeNiro on a parkbench for an hour. My buddy had no idea who he was talking to, which apparently was refreshing enough for DeNiro that he proposed setting up a playdate (which didn't happen though).