I don't think anyone seriously thinks that all American cheese is American Cheese, as it were. But there is still a severely limited selection of cheeses compared to Europe, and even where you can get some good cheeses you often have to go to specialist shops, the selection in supermarkets is often dire. Because of the ban on unpasteurised non-aged cheese, you don't get proper brie de meaux, camembert, reblochon, mimolette, a lot of goat and sheep cheeses, a lot of blue cheeses etc. etc. Hard, pasteurised, cows' milk cheeses are done well in a lot of the US, but they seem to be the only type of cheese that is. For anyone who grew up with European cheeses, it's pretty lamentable.