This isn't a corporation it's a cult.
What does it mean, really, for all employees to bring their full creativity to work? They're a SHOE SELLING WEBSITE. Unless Hsieh has figured out a way integrate basket weaving into tech, sales, marketing or leadership he doesn't really need/want "full creativity" and he's just leading everyone down Jim Jones way. He's a true 21st century shaman priest because he can't deal with his success so he thinks he's superman and he has to impose his vision of a utopian future upon the rest of the world to make it better because he's "superman". (Just like every other megalomaniac the world has seen like Hitler (there I've invoked Godwin), Alexander the Great or Khan (Genghis, not Noonian...)
I've worked the gauntlet of companies from startups to radically successful small companies to stifling mega-corps (Why yes, your team of 4 built a fully working system in 6 months but we need to hire mega-contractors for 5 million to rewrite it all because then it'll be "legit"). I'm now working for a company that's trying to go Agile because even though they were wildly successful with traditional methods Agile was gonna solve their weaknesses. Well guess what, they've STILL got the same weaknesses (it's hard to estimate dev time for wholly new systems, political blockers, fuzzy requirements, fuzzy design) but now development is faltering because everyone's spending more time trying to make sure all the agile paperwork is up to date rather than putting all their effort into the products themselves!
That's not to say Agile is worthless but my point is that a process is only as good as the people implementing it. Not the other way around. So what does that make our company? Orange? Teal? Green? Plaid? (Can't... do...plaid!).
Producing products (those evil evil materialists) requires a unified goal. Unified goals do not come out of self-discovery. They come out of one man or a small team with a unified vision. People can then choose to work towards that unified vision or not but the end result is the same - the effort and energy output is ONE way towards the team and up the chain of command (or to the people driving the vision). You want happy people Hsieh? Pay them well, simplify their workload and give them dependability that their job will be there so they can have the comfort and psychological energy to discover life themselves as they want it. Not as you want to impose it you tinpot dictator with delusions of godhood.