A teacher, worth their keep, will sit with a student and probe their understanding of the paper. The student will either be knowledgeable enough to demonstrate that they used the AI to help them discover information, and phrase their paragraphs, or the student will know nothing of the subject and fail the examination portion of the assignment. The focus will be guiding the student's learning experience and there'll be no question of their status.
Lazy teachers assign papers that they read and grade with no appreciation for student learning. Any student can turn in a paper written by anybody using whatever sources and a lazy teacher will just read it and grade it and be done. The focus here is meeting an expectation, checking a box, and throwing the student to the wolves if they dare step over a line.