Many people here are taking away from this that substituting our own writing with the writing from an LLM is a danger for human development.

I see things more optimistically. If good writing leads to good thinking, then anything I do to improve my ability to write well transitively helps me to think well.

In that sense, I actually see a huge benefit to LLMs in improving my writing and therefore improving my thinking. Not only can I ask for detailed and powerful feedback, I can also ask for more details on background context or related topics that I wouldn't be aware of.

I believe judicious use of LLMs can make us better than we could be without them.