Literature operates by an intractably complex interaction between the words written on the page and the mind of the reader. Exchanging a single word for another may totally alter the effect of a passage, based on factors like the meaning of the word, the associations the word has for each reader, and the aesthetic appearance and sound of the word.
Moreover, we have no objective way of measuring the effect of literature. We don't have a test that can measure how much more empathetic I become after reading a novel, or how much more I understand the human experience.
Computer code typically has measurable outcomes. While "readability" may still be a relatively subjective measure, we can at least say "these two versions of this function are equivalent" if the outcome is the same - the array is sorted correctly, the transaction amount is calculated correctly, the graph is rendered with the same pixels.
This means that editing computer code is nothing at all like editing literature. The cliff-notes version of Macbeth can never produce the same effect in the mind of the reader as reading Macbeth -- but a function that is subjectively easier to read can be shown objectively to produce the same effect as the original function.