This is really nothing new. "Ethical problems will never be resolved by a software tool" [1]
The author uses a straw man argument that plagiarism detection software promises to "replace the professor" when in fact, it is just a tool.
Besides, there are highly sophisticated ways of cheating that even a professor would not catch reliably. I wrote my undergrad thesis about plagiarism and it was interesting to learn that there are students who are highly motivated to "beat the system" instead of doing the task properly.
[1] https://www.researchgate.net/publication/248606848_Support_f...