One reason I love America. They take original cuisine and improve it. The best is where they don’t stray too far from the traditional but just add certain things to make it even better.
A lot of things from other countries, including cuisine, are like they are because of tradition rather than genuine preference. They tend to be bound by tradition - tradition for tradition’s sake - like a national identity. But America rebels against tradition for tradition’s sake and finds the path to preference, the best, as I said, being that which preserves the goodness of the tradition while adding desirable improvements.
Oh, boy, you better be on the look-out for the 'Culture (amateur) Police' for your 'Cultural Appropriation/Misappropriation!' Like so many of these recent brew-ha-has, I think this grew out of a college bull session amongst the perpetually disgruntled / professional victims. Some delicate snowflakes got all twisted when their school's food service decided to have a "Mexican Night" (without their permission!) Oh, the hugh manatee of it all!
PS: I agree with you to the point that much of our ethnic-derived foods can be considered 'better' because it matches a different people's tastes (ours!) I have yet to see a food police that forced 'our' cuisine upon an unwilling native! Even (especially?) at Guantanamo, the Islamic murderers get their meals all kosher (oops) I mean halal!