I have some issues with the concept of authenticity in terms of cuisine but also culture in general. If you look at Italian food for example (which I love by the way), you realize that pasta comes from China, and tomatoes come from South America. These traditional foods have been borrowed from other cultures in many ways.
On the other hand, what seems more stable about Italian food is that dishes often rely on a few high quality, fresh, regionally specific ingredients. Not that Italian food doesn't also used dried, canned, or otherwise packaged foods (preserved meats are also a big thing), but using pre-made, canned or jarred sauce that is ready to eat doesn't seem like the ideal way to prepare pasta. Sauce is pretty easy to make, and making it fresh and letting it simmer all day makes a world of difference.