A good tip, and I try hard to find a balance. I raise this question once in a while to myself. But some areas like modern physics or biology or medicine are inaccessible to me to create because I’m not smart enough in “calculate” part of it. Instead I put free time efforts in my main area, human-oriented programming, hoping something meaningful will come out. Not even for money in there.

Even writing this comment, I can feel the waste of time it is, or any other comment

Seeing people now who got drunk and went walk instead of reading and having on-topic conversations “back then”, I don’t think you are wasting your time. I prefer not to be them, even if it would make me happier. Thanks for your time!