Everyone has things they want to keep private. If you disagree I suggest that you film yourself walking down the street naked whilst saying your banking login details. Then post this on YouTube. Don't want to do this? Then you have things you want to be private too.
Making something public and making an infected file available only to Microsoft, if and only if they have a good faith reason to use it to improve their products and services, are WILDLY different.
Who keeps their own (or someone else's, for that matter) nude selfies? What fucking planet am I on? If I need to produce one (I have never needed to) then I get naked and take one. I don't keep a stash of naked selfies for retirement.