As someone in media, I'm well aware of how hard it can be to get experts to weigh in on articles like this, some of which are thrown together at the last minute. But excuses are easy. The Times simply can't expect to be taken seriously while overlooking black and Latino Americans—who will, by the way, soon outnumber the white people covering their "Room for Debate Page."
Related: Change.org has put together a petition to try and increase diversity on the New York Times' op-ed page. Go here if you'd like to sign it.