I partly agree with your comment: "some people in society are being damaged because [of] their parents ...". Blaming the kids for their parents' failings is what isn't fair, but the parents themselves are likely victims of their own parents' failings, so no point blaming them, either.

"making the choice to be badly organized and to use incompetent childrearing approaches"...much of that behaviour is also learned and inherited from one's parents and environment, that is part of the "social capital" some get and others do not...

But I agree it would be more productive to focus on how to mitigate what goes wrong in those cases, than to blame those for whom things go right...