Writing is the last part
Ask someone what a journalist does and they say writing. Ask a journalist where their time goes and writing is rarely the largest share.
Reporting. Finding out what happened. Calling people, reading documents, filing records requests, sitting through hearings, checking claims, cultivating sources who will tell you things over years. This is the work, and it is mostly not at a keyboard.
Judgement. Deciding what matters, what is a story, what is true enough to publish, whose account to believe when accounts conflict, and what the audience needs to understand it.
Composition. Turning what you know into prose that a reader will follow: the structure, the opening, the pace.
Production. Headlines, standfirsts, captions, social copy, newsletter versions, search optimisation, the metadata nobody enjoys.
The compression follows the same shape as every profession in this catalogue. Production compresses heavily. Composition compresses substantially, with a caveat about voice that lesson two covers. Judgement does not compress. And reporting barely compresses at all, because it consists of getting information that is not written down anywhere, which is precisely the definition of what a model trained on written material does not have.
That last point is the whole cursus in one line. A model can only work with what has been written. Journalism exists to produce what has not been written yet.

