Creativity is a combination of inspiration and originality. We are constantly deriving from previous works and seeking to improve upon them, or twist and add upon them to create a whole another category. Regurgitating or stealing would imply that the work has simply been processed and spit back out in the same (or lesser) form, which is definitely not true. We take in ideas or methods that already exist, yes, but we also produce a better, new form of it.