True, there really are a lot of people making proper cheese in the US. Wisconsin has a large amount of Dutch-style cheese production (stemming from Dutch immigrants). There's plenty of French ("mold cheese" like camemberts) and Italian style fresh (ricotta, mozzarella) cheese producers. Probably proper British cheddar producers as well.
So yes. Tons of proper cheese being made in the US, all [insert country]-style cheeses though.
But what exactly is "American cheese" then? I'd say this can only refer to this plastic crap. The US exported this yellow dyed cheap plastic curdled milk through McDonald's, then the rest of the world started making "American style cheese" because it is cheap to produce and has a long shelf life.
I would genuinely be interested to hear if there's any exceptions? Are there any actual cheese making processes that were invented in the US that are not a derivative of immigrant cheese-making?
Any Native American (buffalo?) cheeses maybe?