This is a wonderful rule.

It also points out the need for AI writing tools that very strictly just:

1. Point out misspellings and typos.

2. Point our grammar mistakes, if they confuse the point.

3. Point out weaknesses of argument, without injecting their own reasoning.

I.e. help "prompt" humans to improve their writing, without doing the improvement for them.

In fact, I would like a reliable version of that approach for many types of tasks where my creativity or thought processes are the point, and quality-control feedback (but not assistance), is helpful.

This is a mode where models could push humans to work harder, think deeper, without enabling us to slack off.