https://www.nuroretention.com/blog/officials-80-percent-of-r...
https://www.npr.org/templates/story/story.php?storyId=121374...
https://foxbaltimore.com/news/project-baltimore/baltimore-ci...
https://www.washingtonpost.com/local/i-couldnt-even-read-the...
https://phdessay.com/can-illiterate-students-graduate-from-h...
https://www.washingtonpost.com/news/answer-sheet/wp/2016/11/...
https://www.highschoolcube.com/the-high-rate-of-functional-i...
And the list goes on. Several of these articles cite a rate of about 20% of adults in the US being functionally illiterate, with about one third unable to read above a 5th-grade level.
If homeschooling produces better results than that, then I'm all for it. Again: Kids need individual attention which they can get more readily in a homeschool environment. In large institutional public education systems, they just get "passed along" as they may be one of 30+ students in a class, and one of 5+ classes a teacher has. Public school teachers don't have enough time in a week to spend one-on-one time with each of their students. In the 90s my high school had class sizes of 35+ and I'm sure it's worse now in some schools.
> And I don't think you can produce a single example that was homeschooled.
Yeah, I can. Multiple in fact. That's the reason for my initial comment. My experience here isn't exactly unique. Search this threads, there are others raised in these sorts of communities that have similar experiences.
You can find these people to if you like. Simply go attend a fundamentalist religion service and ask around their homeschooling programs. It's really not hard to find if you know where to look.