This sentence will be used in later cases to force homeschoolers back into the public brainwashing system once the exodus begins.
They used to use the truancy laws to force Catholic children back into the Protestant-dominated public school system before we established our own parochial schools. So it's nothing new, really. Sadly.
once the exodus begins
I'm sorry, but I don't think there will be one. (There should be one, of course.) Many parents, especially the irreligious, are apathetic about their responsibility to educate their children - most importantly in areas of morality - when the state will do it for them. Others simply have very busy lives and use the system as a "free" nanny. Still others find it hard to justify the expenditure of time (or tuition for a private school) when they are forced to fund the public system through their taxes, especially as no tax-relief is forth-coming for people who opt out of state-controlled indoctrination.