My anecdotal experience is this is good thing to do. But I am addicted to devices, especially HN, Reddit and a game I won't mention because I don't want to get you addicted to it too. I think you can get a lot of joy by letting your mind wander! It may not be productive (like an Eureka moment), but it can be fun, it can also remembering to do something you would have otherwise not thought about.
We're also addicted to HN and Reddit! This sounds like a game for us!