Hmmm, I read through what I wrote and I can see that I believe that about 90% of what most people would call creativity is actually methodical, patient, hard work. which requires considerable effort and persistence. Like the saying that genius is 10% inspiration and 90% perspiration.
I think fear of being seen as mad is also a huge obstacle to creativity. For example, a good solution to a problem might be to use a piece of furniture upside down. But people are quite likely to say You can't do that" (because no-one else does it.) Or they might start speculating and gossiping about your lack of sanity.
This is a very serious consideration because society has very severely punished people deemed mad, to the point of imprisoning them, torturing them and even mutilating and killing them.
Anyone familiar with the way that mathematics was taught in pre-WW2 Hungary, and how it generated this incredible community of creative mathematicians will know how creativity flourishes in an encouraging (and safe) social context. Anyone familiar with Amy Wallace's book The Prodigy about a very clever young American man, and how he ended up being an isolated social misfit, will know how rarely safe creative communities arise. Through history, human society has probably painfully discarded and wasted its cleverest people because they could not generally be understood and were seen as mad.