Eh I don’t think it is BS. Not sure what your issue is with homeschooling; however, based on statistics, yes I would say that most home educators are up to snuff...
https://www.nheri.org/research-facts-on-homeschooling/
Academic Performance
The home-educated typically score 15 to 30 percentile points above public-school students on standardized academic achievement tests. (The public school average is the 50th percentile; scores range from 1 to 99.) A 2015 study found Black homeschool students to be scoring 23 to 42 percentile points above Black public school students (Ray, 2015).
Homeschool students score above average on achievement tests regardless of their parents’ level of formal education or their family’s household income.
Whether homeschool parents were ever certified teachers is not related to their children’s academic achievement.
Degree of state control and regulation of homeschooling is not related to academic achievement.
Home-educated students typically score above average on the SAT and ACT tests that colleges consider for admissions.
Homeschool students are increasingly being actively recruited by colleges.
https://wehavekids.com/education/Do-Homeschoolers-Really-Do-Better-on-Tests
Homeschooled students score about 72 points higher than the national average on the Scholastic Aptitude Test (SAT). The average American College Test (ACT) score is 21. The average score for homeschoolers is 22.8 out of a possible 36 points. Homeschoolers are at the 77th percentile on the Iowa Test of Basic Skills.
Advocates of homeschooling point to these standardized test results to show that not only does homeschooling work, it is also superior to public schooling. Critics disagree and say that demographic and other explanations may account for the higher homeschooling scores.
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BTW, I don’t have a dog in this hunt—my 3 graduated from a top-rated public high school and all went on to public universities—one completed PhD, one completed MS, the other beginning MS...
I did have nieces and who were home schooled—all turned out very well!
I don’t believe a home-schooled generation would lead to an illiterate public.
Homeschool parents are not ordinary people.
Ordinary people lack the where with all and the inclination to do a better job than the public schools in spite of their propaganda