Probably because it's work. It's much easier to just roll over and give up. A body at rest tends to stay at rest, right? But that's not a good reason.
To be honest, my mild depression doesn't help, but my medicine feels like it's finally working at fuller capacity as they increase my dosage. So I'm finding it easier to read more. Though I haven't done anything more than that. The way to snap out of it though is spiritual practice, this I know. At least for me.
Perhaps I was curious if anyone, like formerly spiritual people, have found that detaching from practice did them good. I'm open minded to everyone's thoughts.
A thousand stimulus make a percept, a thousand percepts make a concept, a thousand concepts make an idea, etc.
Learning is not a perfectly linear process, only after we have gathered the prerequisite understanding of a certain subject can the synthesis take place in our mind that takes us to a new deeper level. So we do need a break from time to time to allow this synthesizing process to do its thing and allow us to move forward to an ever deeper level of understanding.