That’s an empty argument. People don’t have a choice on what third parties share and disclose. People don’t have a choice on things like HIPAA and banking regulations and they shouldn’t because those regulations protect people but don’t regulate people.
Choice doesn't mean controlling the other guy. At some point in the chain trust appears and canaries can be used to see if it has been violated, if you really care that much.
Some people have a non-commercial precommitment to privacy and finding the companies that honor it and relate to it is the choice we want.
If you want to force the discussion about privacy into regulation and non-market forces, then okay? Why would people legally and politically consent to a fully transparent world? The regulation will only end up going one way in the end and for all the split hairs along the way, it won't be in favour of ending privacy...