I write with AI most days and I am not going to pretend I do not. It drafts, it rephrases, it gets me past the blank page. So take what follows as a note from someone who likes the tool, not someone who wants it banned. There is a cost to handing it all your writing, and it is quiet enough that you can rack up a lot of it before you notice.
Writing is thinking, and you can skip the thinking
The uncomfortable truth about writing is that most of the work is not the words. It is the figuring out. You think you understand an idea until you try to put it in a sentence and discover the hole in the middle of it. The struggle to phrase something is the struggle to actually know it. That is not a flaw in writing, it is the entire point.
When you let a model produce the sentence, you get the artifact without the process. The paragraph looks like understanding. It reads like you thought it through. But the mental work writing usually forces, the part that turns a vague sense into a real position, quietly did not happen. You skipped the gym and kept the mirror.
This is not a hunch. A 2025 study out of MIT wired people up while they wrote essays with an LLM, a search engine, or nothing, and the LLM group showed the lowest engagement, what the researchers called cognitive debt. A separate study of 319 knowledge workers found that the more people trusted the AI, the less critical thinking they reported doing. The effect is measurable, and it points the way you would fear.
Everyone starts to sound the same
There is a second cost, harder to measure and easy to feel. These models write in a house style: smooth, balanced, agreeable, faintly corporate. Lean on it and your writing drifts toward that average. The odd phrasing that was actually yours gets sanded off. Multiply that across everyone using the same handful of models and you get a strange flattening, a web where a lot of prose has the same tidy cadence and no fingerprints.
Voice is not decoration. It is the trace of a specific person having a specific thought. When you outsource the sentence, you outsource the fingerprint, and the reader feels the absence even when they cannot name it. Half of why anyone reads a particular writer is to hear how that person, and no one else, would put it.
Where I actually draw the line
I am not arguing for writing everything by hand out of principle. That would be its own kind of pose. The line I try to hold is about what the writing is for.
If the goal is to move information from A to B, a status update, a boilerplate email, a summary nobody will reread, let the model do it and get your afternoon back. The thinking there is not worth protecting. But if the writing is where you work out what you believe, an argument, a design you are still unsure of, anything you will have to defend later, write the first pass yourself. Struggle through the bad draft. That draft is you learning the subject, and the model cannot do that part for you. It can only hide that you skipped it.
The skill you stop using is the skill you lose. Not dramatically, not all at once, just a slow softening you do not clock until the day you sit down to write something that matters and find the muscle is not there. Keep writing the things worth thinking about. Let the machine have the rest.