Just because it's aimless, doesn't mean it's pointless.
To learn, hackers play with with new programming languages. To get the right design, designers try a bunch of ideas.
"The use of travelling is to regulate imagination by reality, and instead of thinking how things may be, to see them as they are. " - Samuel Johnson
Just because there's no immediate outcome, no obvious achievement, doesn't mean the activity has no value.
To get good, to get informed, sometimes you need to let yourself wander.