You shouldn't wear a helmet because other people tell you need to wear it. Instead, you should wear it in order to be safe.
The problem with law is that only good guys abide the law. And you don't need to defend yourself from the good guys, only from the bad guys. And bad guys will violate the law anyway.
I feel this is like saying "we don't need safety legislations at work because businesses take a hit trying to stay compliant, if you don't want to be hurt at work, I'm surprised you're not wearing a helmet already."
Thing is, I wouldn't need "cookie autodelete" style plugins in the first place if companies cared about data privacy.