Developers do spend lot of time reading things. In fact significant part of our jobs is reading and understanding code than writing actual code. We do read other things like docs and articles that are related to our field and things that we might be interested in the future.
But reading junk or things that are not be related to your field is equally important. It provides your mind a way out your filter bubble and to take a step back and look at other things that might be happening around you. Which you usually don’t pay attention to.
When I say junk I am not talking about news or feeds but books as diverse as “Feynman Lectures On Physics: Quantum Mechanics” to “Animal Farm by George Orwell”.