ChatGPT is a tool, and it's hard to argue that someone should be able to work without a useful tool. This is a great argument for advocating in favor of AI at work. Tools are great.

However, education is not work. The point of education is not the production of a finished output. The point is to learn. If teachers let students defer their understanding to AI by using ChatGPT to write assignments that means education stops being about the thing they're meant to be learning and starts being a test of prompt engineering. That has it's uses, sure, but you have to be honest about admitting that's what you're arguing in favor of.

Should education be about getting a real, fundamental understanding of a subject, or should it be about prompting an AI to do work in that subject area? I'd suggest the former is a lot more useful and valuable in the long term. If I was spending money on my education that's what I'd want at the end.