It might not be exactly what you envisioned, but that's where the difference comes in: with a batch processing system, you generate something over night with one input. With command processing systems you generate something with dozens or hundreds of individual commands, and it might still not be what you want.

With AI systems you generate something with one action, allowing you much faster iteration loops. Remember, the author argues that the current prompting still has bad usability. Presumably a system with good usability could allow you to generate what you want with one, or a couple, of attempts.