Acting in public is hyperlocal - your behaviour affects those around you and gives those affected right of reply, if they have the courage to take it.
Publishing your actions on the Internet is a little different. If people were affected by the action, they are affected (likely unknowingly) by the publication too - and the audience that you grant right of reply has at best an ideological horse in the race, not true skin in the game. And not much courage is required to engage with an opposing position.
So "living publicly" on the internet leaves a permanent door open to ideological conflict, mob behaviour, and creates a disconnect between action and reaction - in both time and space.
Kinda alien for a monkey brain to wrap banana powered neurons around.