One way this manifests is in online profiles. You can have a professional blog, where you discuss professional things like how you squashed an annoying software bug or a little-known quirk of your favorite language. The purpose of this is to bolster your career prospects, although there can be sub-goals like forcing yourself to learn a new thing.
And you can have a personal account where you anonymously discuss things that are important to you. Maybe some of these things will irritate some people. Most opinions that aren’t completely banal will.
And the two can never touch.