What kind of parents blames a four year old child?

Watching my relatives neglect their children is always painful, today was yet another example, the four year old crying child with a bloody tissue in her mouth, when I asked, he mother answered: she fell while running and has a cut in her mouth, when I asked her parents where were they, they tried to blame the child.
Why can't people understand that it's never the child's fault? Their job is taking care of their children, they're responsible for anything that happens to them, that's the reason why we don't release the small children into the wild or streets, they need their parents to stay alive.
Unfortunately that wasn't the only thing they where doing wrong, when I asked why they aren't rushing their child to a hospital? They answered we checked three places but didn't find a children's doctor, I am aware that in my country the medical services are shitty but that's no excuse to leave a four year old child bleeding and suffering! It's your child, find another hospital, travel few more streets, find one that has a doctor. What good is sitting in the house to your child right now?
My constant nagging finally made them move and I watched them preparing to go out, you would think in this situation the would put their child's health ahead of anything else, but it seemed they where looking for anything to delay just because the nearest place told them a doctor comes in after few hours.
I don't have much problem with them wearing clothes and shoes, but answering a ringing cellphone that's not even their cellphone is just child abuse.
Unfortunately there's not much I can do, many parents lack the common sense and education needed to raise children properly and all I can do is nagging.