I do cook at OKW, but not every meal. Usually we do breakfast home; I actually bring bacon w/us (frozen) and I buy eggs, milk, muffins, juice, etc. at the general store. Sometimes I bring little boxes of cereals and sometimes we just have melted cheese on a muffin or bagel.
Lunch tends to be out because we are usually out at that time. On the days we are lounging around the pool I may make lunch (tuna sandwiches or something similar) or we buy burgers at the pool. If we are at the parks, we either have PS (Crystal Palace, etc) or we do fast food. We try to make lunch our largest meal of the day, but this doesn't always work out.
I also bring frozen hot dogs from home for times when we are hungry, but are too tired to cook and to run around looking for something that appeals to us. We always have munchies around - microwave popcorn, pretzels, nachos....it is vacation!

I also bring a large canister of ice-tea mix so I can make a pitcher or two every day to discourage continuous cola consumption. We usually travel over to AKL for their pizza, which is really terrific, on one evening or afternoon.
After years of travel to WDW, we've eaten at most of the restaurants there and so we try to strike a balance between eating out and eating in. One of the reasons we bought into
DVC was the convenience of having cooking facilities available....for us it works out to be the best of both worlds. I understand why some people don't want to cook on vacation, although it really doesn't bother me.
One other point - I was grateful to have a full kitchen available on 9/11/01.....WDW pretty much closed down that day (which I believe was the right decision). Folks in the hotels were told to call their front desks if they needed transportation to a dinner reservation at a WDW hotel because the buses were not running. We really did not want to leave the room. We stayed in the room, glued to the tv.....no one really ate a meal, but we did have munchies around which was vaguely comforting. It was a terrible day (and obviously not the best of vacations), but it was a comfort to be at our second home. The general store was mobbed with folks.....somewhat like the stores in the Philadelphia area when snow is predicted.....so a lot of them had the same idea we did.