Just wait until you’ve heard about the war crime that is Ohio Valley-style pizza
Chicago people can never believe that anything they have could possibly exist anywhere else, or, even worse, have pre-existed the Chicago version, which is usually exactly the same or slightly worse.
You can observe this in the wild; just start doing literally anything with a person from Chicago and at some point they will stop and mention “this is nice, but in Chicago we have…” and then go on to describe the same thing.
No it’s not.
I have had pizza all over the us and Chicago thin crust is different than just a regular hand tossed