Homeschooling should be standardised before children are allowed to be dismissed from attending the public school system
Even if the number of homeschooled children is 'low', I don't think children should be pulled out of public schooling without some level of oversight or standardisation the parents/caregivers have to follow.
I think the biggest problem with homeschooling is that its not regulated in most jurisdictions, and it often allows abusive, neglectful, or ignorant and uneducated parents to screw over a child's education, or set them back developmentally.
You can mix and match any combination of those poor character traits, and you'll still inherently understand that this person is not in any position to be responsible for anyone's learning. On top of the fact that many children are pulled out of public school by their abusers, simply so crimes and evidence of abuse can be hidden, with some even dying.
"Hurr durr, let me ignore the final point entirely and make it a single issue about the laws and education" - Basically your comments.