Exactly - that's why when folks say that MK is in need of added dining options, I think more accurately they really just need to take advantage of the ones they already have.
One of the biggest surprises about visiting Disneyland for the first time years ago was the massive difference in food service. Of course, Disneyland is simply more "packed" than MK in general (it took a bit to get used to attraction entrances being right next to each other in some cases, as we are used to wider spacing - in the end, I found it quite charming though), but besides that it simply felt like there were more places to eat in general (and it's mostly not ADR required), there was a much greater variety within the restaurants they have. I had a great cafeteria-style full breakfast in Adventureland*, for example - I don't think you can get much else at MK aside from pastries unless you book a character meal.
Because of all the vast differences between the two coasts and their resorts, I'm sure there are many factors as to why - but what I took away from it was that Disney is definitely capable of a more diverse selection, they simply don't do so at WDW.
*Though, side note, the biggest dining surprise for me was the Denny's across the street from Disneyland. It's as close a walk to the park entrance as the Florida parks are to their bus stops. The place was massive, I've never seen such friendly efficient service at any chain restaurant, let alone a Denny's, and the food was almost ridiculously fresh and well-cooked. I'd be willing to bet it's the among the busiest Denny's in the country, the place is run slicker than anything I have ever seen from a chain. We ate there three mornings - it was great, because they offer a full menu all day.