"Elitist" may be overused, but it's precise in this context. Patterson and Choi are part of the global celebrity-chef elite, the very small pool of people who appear on shows like "Parts Unknown," "Mind of a Chef" and "Chef's Table" and who get invited to events such as the MAD Symposium and Grand Gelinaz Shuffle.
They used their celebrity status to open a restaurant in Watts to promote their concept of healthier fast food. It's preposterously smug elitism for them to talk about that area as "underserved" and a "food desert" when there are so many competing restaurants nearby, plus a Food 4 Less a few blocks away.
The Watts Coffee House, in the next block, is probably being more effective in bringing healthier food to locals by offering salads and baked chicken along with traditional fatty and starchy fare.