Most English-speaking countries teach the seven-continent model. There is no place named "America," so when native English speakers omit "The United States of" for brevity, other native English speakers understand that they're referring to the USA.

It seems to cause some confusion with cultures that are taught the six-continent model (in which there is a continent called "America"). I would guess that it's because a lot of people are unaware of these cultural differences.

Edit to actually answer your question 😅: In English, Canada is in a continent called "North America"

Might be meant to explain that folks say "American" to mean people from the United States more often than the American continents. Especially since it's for teaching people a different language.

There is no continent called America.

However, there is a country that hundreds of millions of people identify as “America”.

Be smarter.

You don’t like to be publicly respected for your informed opinions?

Why not?

Everybody knows what you are saying. What percentage would you estimate are impressed?