When does seeing the word “girl” bother you when it’s used to describe a “woman”?

Personally I would not think twice about someone calling a much older woman their “girlfriend.”

I was watching supergirl and Kara had an issue with being called a girl. Her boss didn’t see an issue with it and said “what’s the problem? I’m a girl you’re a girl…”

I (rarely) see this corrected on social media as well: “she’s a woman not a girl.”