They have the *rights* to do what they like with it, sure. But why would they want to?
"Creativity" - that's the problem. Creativity requires not just continuous spontaneous creation, but also the knowledge of where to use it and where not to. Creativity is nothing without control. FWIW, I also can't find that control in some jazz (the circular-breathing widdle-o-rama style) or guitar solos (widdle-o-rama style again), which are styles that I generally like. If the widdle (on whatever instrument) doesn't contribute to the song, then you're crapping on the song - and I'm sure we can all think of songs (especially rock and blues) where talented musicians have screwed up songs with ridiculously extended solos that don't add anything.