That's already happening - my kids have had papers unfairly blamed on chatgpt by automated tools. Protect yourself kids, use an editor that can show letter by letter history.
2 people I worked with had this happen and one of them is going to war over it as it was enough to lower the kids grade for college or something. Crazy times.
There are of course human writers who are less-communicative than AI, called "shit writers", and humans who are less accurate than AI, called "liars".
The difference is humans are responsible for what they write, whereas the human user who used an AI to generate text is responsible for what the computer wrote.