I do also feel there is this sort of "cult" of self-improvement going around. Like if you're not spending every waking minute of your life learning some new skill or marketing yourself or trying to get a promotion, then you're wasting your time. It's very toxic.
Doing things that you find relaxing should be accepted, even if they don't teach you anything or improve you in any way.
There's some zen to the act, like model or puzzle building. But you can also observe and learn techniques to add to your own builds.
Knowing all the ways Bionicles are put together can help you turn a Porsche into a full transforming Autobot Jazz.