Yeah I know, but some words carry connotations seperate from their original use.
Sunsetting might not be a controversial word in most contexts, but in the specific context of racial discrimination, it’s one to avoid unless you’re openly on the side of racial discrimination and want everyone to know that.
Edit: btw, as is mentioned at the very beginning of the Wikipedia article about them I linked to, another commonly used term for “sundown towns” was “sunset towns”. Because, you know, sundown and sunset are synonyms…