I don't follow your point. "Dark" is obviously a much broader word that can mean many different things. It is less precise than "deceptive" and here it's being

I don't follow your point. "Dark" is obviously a much broader word that can mean many different things. It is less precise than "deceptive" and here it's being used metaphorically while "deceptive" is straightforward and literal (albeit less poetic). Surely you would agree that someone encountering the term out of context would have a much harder time guessing what "dark patterns" means versus "deceptive patterns"?