I'm a programmer so I'm gonna answer this like its an algorithm, here goes:
when the human_being runs the above algorithm in his/her life it looks like this:
If the above algorithm is not run it looks like:
Basically OP you are seeing increased access to a sharing medium and calling it narcissism (a disease mind you), when in actuality it was no more what Gutenberg helped instantiate
Guess I should delete my shares in the Gallery, would hate to be considered narcissistic....