I'm not talking about public information. I'm talking about private communication between you and I. Like truly private, private where you are happy to keep our communication confidential. Except now you have to have the technical know-how and proactive burden of keeping it confidential because Microsoft (and Google in other cases etc) sweep up everything you do.

In other words, if you consent to Microsoft tracking you, it means I cannot trust you in private communication even if you would otherwise be trustworthy person.

This is completely distinct concern from what is true public information.