Interesting. I would argue that these are good reasons it should be against the rules in relevant academic situations, but I see no good reasons to call it “plagiarism”. Needs to have a better word for it, which would cut down on a lot of arguments and confusion.
I indirectly knew a guy who got a bachelor’s in parks and recreation management by writing 4 or 5 papers, and then just updating them for every class. That was also the person I learned the phrase “Cs get degrees” from, so he was very much not a model student.
I can and I will continue to make a fuss about it, but goddamn it, you’re not wrong. He really is.