... and some people travel for the sights, not the food. I have a very weak stomach (I take Prilosec daily) so I don't like variety. When my wife and I went to Paris we dined out twice for local Parisian fare. We didn't like it that much, so we went to the local McDonalds from then on about 70% of the time.
There was a guy from Motorola in the USA stranded in Paris waiting for a visa to his final destination in Africa. He told me he went to McDonalds for breakfast, lunch and dinner seven days in a row.
It's also a society thing. Most places outside the USA eating it a slow, long procedure to be savored and enjoyed. If you are on a short trip, you want to eat fast and keep sightseeing. My $.02