I think you are ignoring McLuhan's very very famous point ("the medium is the message") which is that new forms of media do more than just allow us to extend ourselves in new ways; they change our mindset by enabling those new capabilities. It's not so much what we're using the media to communicate as it is what kind of communication that medium encourages. Television had disastrous consequences on what would seem to be unrelated behavior [1], including an increase in general antisocial behavior among children.

1: https://justinharter.com/my-god-it-was-awfulmy-husband-and-i...