I believe that the writers do this intentionally. ... So the writer actually did this student a favor in this case.
Unless a customer specifically asks me to write a mediocre essay (which happens but only
very rarely), I assume that my customers wouldn't consider me to be doing them a "favor" by providing them with a piece of writing that was "disorganized and unfocused in some parts." While I do routinely tone down my writing to the level of excellent undergraduate (vs. higher level) work, I'd never intentionally send them anything that requires corrections on their end. I always assume that they're paying me their hard-earned money for work that's submission-ready in quality and without any mistakes. Whether they ultimately choose to use my work as a model or as an actual submission is entirely their choice and nothing that I would have any way of knowing once my work is complete. However, even (perhaps,
especially) when the work is intended as a model essay, I know that what they're paying me for is a model of what a project is supposed to look like when it's done perfectly, not imperfectly, much less "disorganized and unfocused in some parts." That would seem to me to defeat the whole purpose of paying for a model essay, in the first place.