I think we need these smaller distinctions to have a meaningful conversation about food. If not, French crepes would be too similar to Norwegian pancakes, pizza and quiche could be the same if you ignore the yeast and tomato sauce, and if you really want to stretch it you could group Japanese ramen and Polish pasta soup together. In some ways I want to agree with you, for good ideas usually pop up multiple times and places, but I am too fond of traveling and tasting different food traditions to give in.