> it is a legitimate desire from an application developer

I want a pony! A legitimate desire. So it's okay if I rifle through your underwear drawer in case there are any ponies I could take?

Requiring there be a physical phone is a speedbump at best ( https://i.dailymail.co.uk/i/pix/2017/05/12/13/403C0D44000005... ) and so de-anonymizing every person using the internet by attaching them to a device and allowing google to track them is not sufficient, nor is the privacy loss necessary for the kind of improvement they could realistically hope to achieve.

But most over even if the panopticon were highly effective and even if were the only option to achieve that end we should still reject it because it's wrong.