It's not. I'm pointing out that you're doing the same thing you're complaining about.

There is no other country on Earth that has "America" in the name other than the United States of America. This whole "but but but they're all America" is just some terminally online crap.

You know what someone from Mexico identifies as? Mexican. Not a "United Statesian" despite that being the official name of the country.

Someone from America is an American. They're also a North American. Someone from Brazil is a Brazilian. They're also a South American. Someone from France is French. They're also European.

The only time someone gets confused about that concept though is when it's the USA for some reason. And only online.