This is a trope and not useful for solving problems of culture, psychology, or addiction. It is the same as saying "when you ban guns, only criminals will have guns" or "everyone has a choice, so choose not to do drugs". These are vapid recitations and cannot address complex issues.
This is absolutely not the same as your gun ban argument. It is also not the same as your "choose not to use" argument. How do people think they can give away all of their information, to someone who trades in information, and somehow act surprised when that entity leverages this information?