> since a lot of normal interactions such as banking almost requires you to have such a phone.

I can get by without carrying a microphone-and-camera equipped computer controlled by someone else around, and so I don't; but, if I want to return something I bought on the Internet, I don't get a receipt; and, if I want to go to a bar, there's a risk I won't be allowed to pay. (There is a law against the latter problem, but it is not enforced.)