He follows up on his blog with this.
All of this is a long way of saying that instead of resisting the implausibility of the pairing of NFL quarterbacks and teachers, it is actually more interesting to embrace it. And what happens when you do that? You discover that the psychological situation facing the gatekeeper in both cases is identical: that confronted with a prediction deficit, the human impulse is to tighten standards, when it fact it should be to loosen standards.
This seems right to me.