Whatever your beliefs, it's no contest – Nature is the best artist ever.
But when you're creating something, you get to play God in a tiny way.
Take creating characters for a story, for example. I am imagining some kind of science lab with bubbling cauldrons and test tubes. The writer is mixing up some kind of potion... A few drops of inspiration from a school friend or an old teacher... perhaps a teaspoon of that guy on the bus... perhaps 300ml of a singer you saw in a concert... et voila.
A whole new person who has a thing about strawberry jelly and who has to always put their left shoe on first.