A good commit message is not a record of human intent, it's a record of changes in human intent. You can read a change log to see the evolution of a codebase, sure.
But before AI arrived on the scene, source code was a single artifact that directly expressed the intended behavior of a piece of software as it currently exists. After AI, the artifact is still there, but it's no longer the true record of human intent.
A good commit message will survive longer than this proposal is the point.
What the author is proposing has a long history of similar ideas: Literate Programming, UML modeling, DSL crazes, and now to LLM-generated abstractions. AI isn't special. They always fail in the same ways as basic "commenting your code". One can even argue that unit tests are a close cousin to this same problem. Taken one step further how is Huzzah better than just using property tests?
But before AI arrived on the scene, source code was a single artifact that directly expressed the intended behavior of a piece of software as it currently exists. After AI, the artifact is still there, but it's no longer the true record of human intent.