The Scrabble game example is weird and doesn't match my experience so far.

In the example of Scrabble with Google Bard in this video, the AI isn't following a basic rule of a board game (only squares that exist are playable.) I think the problem specification was probably insufficient and could have been tweaked.

The AI followed my subjective specifications for viewpoint, tone of writing, and limit on words exactly. I was amazed how close it came to something immediately usable.

In the case of writing prose you're disregard the entire realm of subjective text which is almost all business writing in existence.

Even legal briefs and depositions can be written subjectively - they simply need to follow a specified format. (You think anything Jack Smith wrote up about Trump couldn't be codified into an AI? Maybe that's how the charges were started in the first place. An AI said "you could charge him with this.")

Many, many white collar jobs that depend on good written language skills could be replaced with AI + a part time human editor/curator.