One thing this does is gives a false view of success. Most of what people share is what they want you to see. Skills are advertised, flaws are hidden. Wins are exaggerated, losses are downplayed. Doubt and anxiety are rarely shared on social media. Defeated soldiers and failed CEOs rarely sit for interviews.
Maybe one of the biggest problems with the internet is we post what we think we see and then cite ourselves as the evidence that that thing is reality.