The best lesson I can pull from Lehrer’s mess of an article is this: creativity is personal. Building 20 was built cheaply and seen as a failure, which made it easier for motivated creatives to rearrange and redesign the environment. There were fewer rules than your typical building. They were allowed to take control over how they worked. The diversity of people forced people to hear different points of view. And the highly empowered and competitive pool of makers ensured things would ship, and not languish in bureaucracy or self-doubt.
If you want more creativity, hire people who demonstrate creativity. Do not expect to magically graft it onto people you hired for their rigid conservatism. Then give them resources and get out of their way. Let them decide what methods to use or not.