but the questions "Why read another human's writing if an AI's is better?" still has no answer.

Of course it does. Because the human creator was affected while creating it. What you quoted explains the whole thing.

Well, remember, art is not just the story. It is not just the painting or the sculpture or whatever else you love to create. It’s also the process of creation and what that process does to you. We make art because we can’t help it. It’s part of us.

I added bold because that’s the core point. Of course I would rather read something where a human was affected by the process of creating. That’s relatable, and the entire purpose of art.

You read another human’s writing because they’re human, and a human who experienced something while creating is unquestionably superior to what amounts to randomness. An LLM can’t think, learn, or have human-like experiences. It can only copy. Expression is the important thing, and an LLM can’t express.

AI can’t compete with a human’s passion or interest, and doing something with passion or interest is what makes something art.

The act of creation by a human literally makes all the difference.