To me, creativity seems to be an inherent need, or part of the psyche. To not create is to die. Perhaps that is why the Dark Ages were called that. More creation, more light, perhaps. More understanding, knowledge and community. Seems to be a connection there.
I enjoyed the article, especially the points on how to increase creativity. To me I add to those points and write, as much as I can. Write from and about things that inspire me. But out of observation, association, etc.
you are probably right, if we are not learning something new, or creating something new, we might as well be dead.