Yes, I agree. I thought the double qualifiers of "historically" and "perceived" would indicate that I don't personally agree with the notion, but American society at large has agreed with that for most of the last 50 or so years.
My point is that it's perceived that way within America. But the internet is larger than just America. And presumably/hopefully ChatGPT gobbled up all kinds of data originating from other countries.
Maybe if you only consider Americans. But rest assured, many black people do not want to be called African or American. Because they are neither.