So? Why is that, of all things, the crux of whether it’s copyright infringement?
Plagiarism isn’t necessarily copyright infringement, and plagiarism isn’t illegal. Copyright infringement is.
Even still, your argument that everyone who generates 2,000 words in the style of (author) is plagiarizing is also flatly false. By that standard all English essays that mimic someone else’s style would be plagiarism.
