huju, as lakewhut is saying, this was tried en masse and lead to unhappy results. CTL is an exception due to his family background and where his schooling happened. Current day school system is a reaction to that and achieved tremendous results.
It is just not sustainable in long term if we want to have Jews functioning as part of the society and remain a strong Jewish community. It should be possible to accept government funding in a way that keeps kids out of trouble. Charter and private schools accepting funds and accepting testing (better than pushing kids into special ed for federal funding). Maybe real public school in super-majority frum neighborhoods. Online public schools. I think some towns try to decrease funding for public education so that parents pay less taxes, not sure what percentage of total funding that is.