Usually it's implicit, rather than explicit: Nobody tells you to limit work on bugs to 1-2 days, but if you spend an entire week debugging something difficult and don't accumulate any story points in Jira, a cadre of project manager, program managers, and other manager titles you didn't even know existed will descend upon you and ask why you're dragging the velocity down.
Lesson learned: Next time, avoid the hard bugs and give up early if something isn't going to turn into story points for hidden charts that are viewed by more people than you ever thought.
I’m in my mid-30’s now. In high school I learned HTML because I really wanted to customize the styling of my Guild (I think that’s what it was called).
And then built a neopets fan site and forum which taught me basic business (trading links with other fan sites, hiring/managing forum moderators, and eventually sold the fan site during junior year).
The will to customize my MySpace profile was also a driver for learning HTML.
I sometimes think about this in the context of today’s highly controlled platforms that simply don’t make space for users to customize or do anything outside the platform directly.