Well, in my view, it's similar to how we manage a publicly elected government planning laws; we set up an adversarial system with different actors with different incentives all having a voice in the process. So federal government entities have a (admittedly, too loud IMO) voice, but so do local community school districts and the parents that go to their meetings and argue with them. This system acts to sort of filter whatever indoctrination is happening through the lens of all the people that were involved in the process. For better or worse, there is no such filter with home-schooling, it can be purely what the parents think best.