Every web-app or scientific application I've written is merely "rewriting" and stitching together other techniques, libraries, and patterns. I haven't broken any new ground on data encoders/process handling/data analysis, but my work had value.
In this scenario, if ChatGPT provides enough value to reduce my workload and allow me to allocate my effort elsewhere, why is it not a valuable tool, regardless of whether it "creates anything new"?
This same argument can be made against the concept of an IDE. My IDE doesn't create anything new. I used to use Vim with a number of plugins, a terminal multiplexer, and an auto-completion engine.
Why would <insert IDE of choice> improve my workflow? It doesn't add anything new to my existing workflow. But after migrating to my current IDE, the convenience it brought me was significant, even if it didn't add anything new to my setup.