If the user is a capable writer who can organize their thoughts and recognize the difference between good and bad copy, they're going to get much more coherent

If the user is a capable writer who can organize their thoughts and recognize the difference between good and bad copy, they're going to get much more coherent results from tools like ChatGPT. I'd contend that an average primary/secondary-schooler is basically expected to develop those exact skills, without which their AI generated essays will have a multitude of problems just like human-composed ones do.