All true, but the bright spot is this:
Your family actually cares for those kids. They take care to feed their growing bodies with good food, and their young minds and spare time with healthy, meaningful activities. They're not starving for attention and they're not getting pawned off on someone else to raise. They have the very best start they can get.
You can't set the world on the right path, but you can do things to ensure your niece and nephew continue to progress in the best way possible.