I will put a few thoughts here.
Take ill educated parents who work in non stimulating jobs or in pt jobs as they have then time to pioneer.
The home is forever under financial stress. Their one loyalty is to the GB and setting proper classes in a range of topics is an impossible ask given the above.
Perhaps they wont even have a computer because the gb say their is porn and evils on the internet so no computer and that most useful tool of learning is denied. It will be most likely too be a home with no other books or periodicals to be seen.
Hold over it all that the wts says the world is bad (ad nauseum)and here is a nest from where kids are expected to learn and thrive?
But wait they will not be expected to get jobs. They will not be expected to advance. Just earn enough (cleaning windows) so you can pioneer..
and on its goes.
Sadly the least capable of parents are it seems in my experience the biggest supporters of home schooling.
and as the "wing commander" has said (see above) the results are kids becoming adults "who could barely read or form complete sentences", and further in my lifes experience will be at least two years behind their peers in social development and general knowledge.