Excercises should not be about evaluating and judging. They should be about learning. If a student uses an AI, or copies someone else's work, it is to their own detriment. (Exams are a whole different question.)

Even before AI, you could read a book and copy-paste the excercises, or just skip them, but if you wanted the full learning benefit you would type them out. I think we will have to focus more on teaching how to learn. This situation is nothing completely new. Even though you have power tools in woodworking, apprentices learn the basic techniques with hand tools (AFAIK).