What Michigan, and Bowen and Bok, are actually saying here is that there is no discrimination because there's not much of it, and what there is affects only some individuals, not their groups. Their argument is that discrimination against individuals doesn't count. The only discrimination that matters, that is in effect even worthy of being called discrimination, is against “groups” — and even then, only if its impact is severe enough to make a group “underrepresented.”
We are a long way from Dr. King's vision of a colorblind society. And yes, that is what he was striving for.