That's not true, at all.
People can and do use "homeschooling" as a guise to mistreat others. Just like they use being a preacher, coach, police officer, doctor, etc. There will always be people who use a convenient and believable facade, to hide what they are doing. Most homeschooling families are actually doing what they are supposed to be doing...schooling their child. And there are a plethora of reasons people choose to do so. There will always be the bad eggs who keep their kids home for nefarious reasons. (And I'm not going to even get into the thousands of public and private schooled children who suffer abuse that's never noticed or reported.)
My question, is what type of documentation was happening? Looking at Ohio homeschool laws, there has to be a notification of intent to homeschool each year, provide 900 hours of schooling, and provide a mandatory assessment or standardized test scores. I wonder if any of this was happening and if not, who was responsible for checking in on the situation. Lots of questions. This case is so strange. I hope she is found soon. This is a terrifying one.