What they call "gross profit" is not profit, by definition. It's certainly useful to track $revenue-$cost_of_goods, but you can't call that profit. People are free to use words incorrectly, but they shouldn't expect anyone else to go along with them.
Who chooses the "correct" use of words? Is it you? Wikipedia disagrees with you: https://en.wikipedia.org/wiki/Gross_margin. Maybe you should make your own encyclopedia.
