That's because most of us have good pizza joints back home too, and we want to find out whether NY's famous pizza outdoes the places we like at home. We're usually only visiting for a short time and can't try six different pizza places unless we're going to eat nothing but pizza on our trip. And the best place often isn't the famous place. So it's worth it to us to put in the effort to search, while a local might not care as much where they get their pizza.