Until we start having a test to ensure who can parent properly, it’s really a bad idea to hold the kids responsible for their birth lottery draw. It helps absolutely no one to do this. Not the parent, not the kids, not society.
Pulling kids from less than stellar parenting is also not always better. It’s actually not often better. There’s a parent/child bond that is incredibly strong. We have far more luck trying to teach the parents even though that’s not perfect either.
I don’t particularly care to start going down the path of deciding who should or shouldn’t have kids via some sort of test…