Out of 500 companies that access your data the majority might obey the law, but 50 of them won't.
There's also a basic imbalance of power -- for instance, if you don't fill out the paperwork to get medical care that says (1) everybody who could possibly have a reason to access your data can, and (2) we're going to do that at a cost 1000x more than just leaving all the paperwork out on the curb you don't get medical care.
People don't really real all those clickwrap licenses, I mean, Sony makes you scroll to the bottom of a 50 page contract just to play a video game.
There's also a basic imbalance of power -- for instance, if you don't fill out the paperwork to get medical care that says (1) everybody who could possibly have a reason to access your data can, and (2) we're going to do that at a cost 1000x more than just leaving all the paperwork out on the curb you don't get medical care.
People don't really real all those clickwrap licenses, I mean, Sony makes you scroll to the bottom of a 50 page contract just to play a video game.