At the very basic, we want to hide things because other people do not like it (which leads to reaction from shaming to prosecuting and stoning). Fundamentally, the only way for it to not happen is to have a completely homogeneous society, or all human to turn into saints. I will just assert the former to be bad, and the latter to be impossible .
We need save (and private) spaces. At least in my view of the world, where I am on your side, not believing all people will turn into saints. Not even most of people.
So killing privacy and upping surveillance of everybody, we as society will shoot ourselves in the foot and killing new ideas before they are even thought i fear.