This is a very thoughtful post, and I sympathize with the sentiment, but I don't think it's really about "open sourcing" anything. The same could be said if you spent that time building model trains, working on a car, or engaging in any other hobby.
Agreed. "Open sourcing" means you do it for free but your work benefits others. And you may have an opportunity to pass the torch to others. For hobbies you keep it to yourself. I played an instrument for many years in spare time. I enjoyed it a lot. I eventually gave up, because my life changed and many other things popped up. On reflection, I still think it was an intersting experince for all those years. But I don't feel anything for it now.
Yes, it's not different from a workaholic for example. So in this vein, not on topic, because it's not about the license. Still, it's a good lesson, and is technically an answer to "regretting open-sourcing something" - it's just that OP reconsidering open-sourcing their life, not their software.
