This is a push back against the optimization mindset.
The Idea
Not everything needs to be optimized. Not every hour needs to be productive. Sometimes the most valuable thing you can do is nothing at all. Optimization, from one point in time, is waste of resources from some other. Thus, we can't and shouldn't tend to optimize everything.
Worth Reading
These pieces shaped my thinking:
"In Praise of Idleness" by Bertrand Russell — A mathematician arguing for less work. Still relevant nearly a century later.
"Four Thousand Weeks" by Oliver Burkeman — Time management for mortals. Embrace your limitations instead of fighting them.