I often wonder if people who don't write think writing is simply taking a thought and putting it down on paper (or the screen). How boring would that be?
H.L. Mencken was right when he wrote, "There is in writing the constant joy of sudden discovery, of happy accident." There's so much more to writing than just taking what is internal and making it external. It's a form of thinking out loud, and writers discover as much about themselves and their world while they write as the reader does reading the finished work.
Writing is ultimately not about the product, but about personal growth and discovery. At least it should be.
By the way, the fractals in the image above aren't computer-generated graphics. That's a photo of Romanesco broccoli, one of the most beautiful and mathematical vegetables on the planet.