That's why radical reformers so often end up vilified (and frankly, so often end up making some colossal bloomers; institutions are complicated, and reformer's prescriptions are never as complex as the institution they are trying to change).
I think observations like this elevate the debate. They raise the legitimate question of how do we improve a complex system (my view: incrementally and experimentally). But, as Mark has noted, the debate has often drifted into the surreal with even staunch leftists desperately opposing government regulation of education. It is an odd debate.