Earlier quoted context omitted.
I am of the firm opinion that there is no substitute for a formal education. Homeschooling is great if one or both parents are teachers or come from a teaching background. Homeschooling is a disaster if neither parent has much of a formal education, or lack teaching acumen, but still feel that they are qualified to teach their kids. Between those two extremes is a huge range of variability. Exams are going to become…
The facts don't line up with your opinion. A 2016 study by the National Home Education Research Institute (NHERI) indicates homeschoolers scored between 15 and 30 percentage points higher on standardized academic achievement tests and usually scored higher on the SAT/ACT. https://www.nheri.org/research-facts-on-homeschooling/
Your statistics support the previous claim. If you have a group out performing the public school by 15 to 30% there will be more spread in educational outcomes. Many would see that as a good thing when some kids get closer to reaching their potential, but not everyone wants that.