Ones who used to rent a house next to us grew up like that. I shudder that they may be reproducing now.
We can all produce anecdotes of single instances illustrating any point we want.
OK. How about the numerous instances I had of parents disenrolling their kids to home school them after 10 years in public school and the child had been diagnosed with multiple learning disabilities? Who home schools a special needs kid when the parents never graduated from high school?
The government school classroom is tailored to one type of kid, the one that can sit still in a chair and focus for an hour at a time, then move to another chair and do it all over again. A large part of classroom time is consumed by the teacher maintaining order, and our standard response to kids unable to fit in that mold is to drug them into compliance. That is not a good thing.
Taking a child out of a government school who is either failing because of disabilities or incorrectly marginalized as learning disabled and teaching him/her at home can give that child a fighting chance at an education that they would otherwise be denied. I have personal experience with one of my children.
Even parents with little education can successfully home-school if they use an online curriculum, with teachers on the other end to collect and grade classwork. There is very little reason most parents cannot successfully home-school.