This is what it's all about. At least for me as a writer. It's the same point as the John Gardner "describe the barn" exercise.
Describe a barn from the point of view of a man who has just learned that his son has been killed in a war. Do not mention the son, the war, or the death. (The exercise should run to about one typed page.)Okay. That's not what it's all about; there are other things. But that's a big one.
There are so many ways of writing that page of description. So many correct answers to the problem. And the process of evaluating those answers is so difficult.