Though I have not encountered the 'writer's block' per say, I was concerned I was not bringing enough new, or originality... In your insight, I see the door out of worry, that maybe we evolve not through spontaneous leaps of landscapes illuminated by lightening flashes, but by revisiting and tweaking our narratives the way a gardener may prune their Bonsai tree. It still allows for moments of lightening, but maybe the words are the rain drops that make the canyon over time...