It sounds like this parent did a decent job, and had their heart in the right place -- enhancing their child's education. In my experience this is the exception to the rule with homeschooling. I might have some blinders due to my personal experience though.

I and my 4 siblings were homeschooled K-12. My parents opted to homeschool so they could maintain control over what their children learned. Everything was taught through the lens of Fundamentalist Evangelical Christianity. History, Math, Science, Writing, Reading, everything.

My Mom is allergic to math and logic, and she never hid her distaste for those subjects. Calc-useless she would laughingly call it while she told me she couldn't help me with a math problem. Algebra was a fucking disaster until she found a VHS course that included a help line subscription for when we got stuck. And ohhh we would get stuck. It's hard to find motivation to learn something hard when the teacher mocks the very idea of the topic at every turn.

Sci-lience she'd say as she redirected me from an Encarta Encyclopedia entry on Evolution, and on to the Abecca Books "god made everything in one week and thats it" 'science' textbooks. It's hard to make friends with peers when you sound like a goddamn idiot saying things like "if the earth moved 10 inches away from the sun we would all die of cold!" with a straight face. No one wants to be the kid whose friend then stands on his chair, looks you cold in the eye, and says "I'm certainly not freezing here, 24 more inches away from the sun than you".

The concept of attending college was outright mocked, which is weird because both my parents have college degrees (they met in school), and my Dad even had a teaching degree (not that he ever used it). When I turned 18 there were vague overtures towards me maybe going to school, but no one did anything real to help make that happen, so I just didn't go. I'm lucky that my side hobby of slinging CSS was able to pivot into a real job (around 2004) otherwise I'd still be out working construction.

The result is grim. None of us can even prove we went to Highschool. None of us have attended an accredited college (some have gone to non accredited christian colleges, and the degrees are _not_ worth what was paid). This bit depends on the state you educate in, but in Minnesota a homeschool is technically a small private school. Schools are in charge of maintaining graduation records, there is no central reporting agency. My Mom and Dad are forever charged with proving we went to highschool, but the employers that do critical checks of this kind of information are not impressed or interested in "high school transcripts that look like your mom made it". I personally had a job offer for $130k rescinded after the background check was unable to verify my HS graduation, and even with a decade of proven work experience and multiple high-quality references HR was uninterested.

The linked article describes a level of homeschooling that I would have died to experience growing up. I was so hungry for real information but everything I was taught was so obviously filled with lies, and the teacher was unqualified and unassailable, a deadly combination for a curious, learning brain. How do we make sure homeschooling as a concept delivers more outcomes like OPs, and less like mine?