1 - Homeschooling has been documented as locus of identity abuse by withholding modern identity paperwork required to prove citizenship. This insures the child remains dependent on the family and religious unit into adulthood since they have no documentation to prove they are a citizen. [1]
2 - Homeschooling allows for abusive parents to be abusive with limited opportunity for a mandated reporter discovering the abuse. [2]
3 - When I went through high school and college, a homeschooled student was rare like a unicorn. I never met a single person. When I went back into a school setting in the last 5 years I met several. Anecdotal observations: (a) untreated autism spectrum disorders, (b) homeschool teachers unqualified to teach math & science leaving the adult student unable to academically survive college level sciences despite a passion for science subjects, (c) a well adjusted kids who joined 4H programs and had parents with a scientific background, and (d) one student with a deep love for English literature.
On the whole, I'm dubious when I hear of people home schooling. I ask things like "Do your kids have birth certificates?". "Do you immunize?". "What is your math and science background?". "Are your kids being socialized with their peers?"
I'm sure the homeschooling parents really love me. But a number of homeschooled kids are child abuse victims and I feel an obligation to probe these weird situations.
[1] https://www.washingtonpost.com/news/post-nation/wp/2015/03/1...
[2] https://www.responsiblehomeschooling.org/policy-issues/abuse...