@AC "So why not ... make something useful?"
How do you think people who are able to make the really useful things learn? It sure isn't through playing by the rules, and doing only that which others deem "useful".
I always thought the best way to learn how something works is to try to get it to do things it isn't supposed to do. Don't limit others just because it doesn't fit your pitifully narrow world view of how the creative process works.