The subject is "AI exams", not "exams". GGP expressed that they believe that AI exams would be an extremely unpleasant experience to have your future determined by, something I find myself in agreement with. GP implied that students deserve this even though it's unpleasant because of their actions, in other words they agree that this is unpleasant but are okay with it because this is punishment for AI cheating. (And which is being applied to all students regardless of whether they cheated, hence the "collective" aspect of the punishment.)