Don't forget, that's the Disney breakdown, not the members breakdown. Disney considers the view a MK view even if all you can see is the rooftop of a service building that's in the park, that's a MK view. Looking at the building only a very small section will have a straight on castle view and that is what most people consider a MK view.
We were staying at WL a couple of years ago when a couple of Cast Members asked to see our balcony. They were there to re-classify the room views. We were in a courtyard view towards the lake end of the building. The Cast Members decided that you could see enough of the lake through trees that our room was now going to be a lake view room.