It's more often things like going on a walk and identifying the birds, going to the bar and getting better at telling stories or playing pool, seeing patterns in watching daily traffic or weather. Things you absolutely could go deep on, but just can't justify as "character building exercise" because they won't directly lead to you acquiring property or power.

And that's where the alarm bells start to come in; if you get anxious about that, you can get stuck on the idea of work and cut yourself off from a balanced set of interests, and this hits young people especially hard because they don't know what the balance could look like, or they observe media(including HN) where the balance is clearly defined towards one extreme, think "I will become that" and treat it as a masochistic exercise. I believe this to be a deep affliction of the online world particularly since, without trying you can stumble into media containing the "best" of everything.