Surely the irony is not lost that USians fret over alfalfa and oranges getting shipped overseas after so many decades of shipping oil, autos, bananas, etc. into the US from around the world.
If you are a non-native English speaker, you probably want to avoid this term unless you are conscious that many readers will code you as "progressive left". It's not as strong as "Amerikan" (sometimes used to imply Americans are Nazis), but it has a similar register.
Here's an HN thread from a few years ago about it: https://news.ycombinator.com/item?id=9994159.
I've come to accept that I am pedantic. I use phrases like "Native American" to avoid ambiguity, not for any political correctness. I don't refer to anything east of Colorado as the Midwest. I sometimes call cornets trumpets but mostly because I am ignorant. Mostly I find that it's less work to use accurate language instead of long clarifying explanations. But you got me this time.