From the description of the recommended tool it sounded to me like something that you use to deterministically generate code from a spec, which you could then modify if you like. That would be the same kind of dependency as the LLM workflow you describe, except that the abstraction is well-defined in a way that the LLM is not. Whether it's good or not is a different question.
That would be nice if it were the case but from what I can gather from this interesting dependency graph, there's a hard dependency on its renderer and schema.
https://jsonforms.io/img/architecture.svg
You can add your custom renderer but you still need their library for bindings and such.
With LLM driven code you can generate code once, and then if anything is shitty about it you can always manually update it yourself without the need of an LLM. It's a dependency of convenience, not an app-dependency.