Let's say you're on a boat and the boat springs a leak. You face a crisis: too much water and the boat will sink. One group wants to plug the leak another wants to start the bilge pumps and a third wants to do both. Suddenly a dim bulb shows up and says: No, let's fire the deck hands. If you decide that the dim bulb is correct, you really have no place talking about this crisis and it's solutions.
As we all know, Detroit is a failed city and its school system reflects that. The "learning outcomes" of its students are reflection of the corruption, poverty, and so on. Yet Matthew Yglesias views this particular engine room slowing filling with water and insists that the deck hands did it. Moron.