I think there's definitely harm and it doesn't even require teachers to use it. Lazy students will plug anything into chatGPT. Instead of obviously plagiarized

I think there's definitely harm and it doesn't even require teachers to use it. Lazy students will plug anything into chatGPT. Instead of obviously plagiarized unreadable garbage like you used to get, you get coherent AI maybe garbage that's harder to detect. And students not doing the assignment doesn't help them. It's also limiting to require all work to be done in class or oral to try and prevent usage.