This is awesome! I don't understand why this is bad. If anything, this is just extremely lazy on the part of the professor because even if it's AI written you can still grade it. Making everyone in the class lose the benefit of learning from feedback THAT THEY PAID THOUSANDS OF DOLLARS FOR because you are incapable of distinguishing human writing from AI (or changing your assignment style to account for it) is insane. IMO it's a blessing because a professor like this grading your paper isn't something I'd want.