and when you go anywhere in the entire world and say you're from America they will think you mean the U.S. and when you get to give your little lecture about the technical definition of America they too will find you tiresome and unpleasant.
Your argument sounds so weak right now. Really? "I don't live there! I mean, I did. Last week. But now I'm not from there, I'm from here". Whatever dude.
Wherever you are now, I bet there's at least one person in town who would deck you if you tried to call their country, that they're proud of, "America", which is the name of another country that they've likely been screwed by in the past. Except I bet you're still in California.
I'm currently hanging my hat in America. I'm not in the US.
It doesn't matter where I am. That doesn't affect thr really that conflating the US with all of America is rude to the vast majority of the population across two continents.