True creativity comes only when unfettered.
No, true creativity comes only when the fetters are so tight that only the truly creative can escape them. Stan Lee and Jack Kirby, and Steve Ditko, for that matter, created the most popular comic book superhero universe during the most stringent era of censorship by the Comics Code Authority. And they did it by pushing, but not pushing past, the boundaries of the Comics Code. Remember, the stories that they told that broke the boundaries were not only not approved by the CCA, but they were never repeated. You can't test the limits of your creativity, and what's permitted, if there are no limits set, and that breeds laziness like you wouldn't believe.