Sometimes in a private conversation I will say things I would not want the public to hear me say. In places where there is one party consent it requires much more trust to have these types of private conversations, because any conversation could be recorded and placed on twitter.

For example, I think it's awful that in some places it's legal to privately tell you friend about a mental health struggle you are having, and for that friend to, without your knowledge, share a recording of that conversation with other people. In my mind two party consent is a basic data-privacy law. You cannot create a record of something you expected to be private. You can have an expectation of a private conversation to be private.