I grant that I have no evidence for this claim but: I don't see how it's reasonable to teach a subject with access to such a powerful tool and then to remove that tool to assess what the student has learned. My primary uses for LLM, limited as they may be, are explicitly about things I do not care to know, and I find it difficult to hold in my head how ChatGPT is going to help me learn anything in such a way where my understanding of it and use of that knowledge is not hinging directly on continuing to have access to it. And, more broadly, there's reason to suspect that the student will have access to it after that class ends, so it runs up against that old axiom of school meaning to prepare you for working life.
My math classes never interested me, I did the work on calculators whenever possible, and sure I have decent mental math skills, but I still pull out a calculator (app) for everything because... my meat brain just isn't as good at this task as this silicon one, and not only does every smartphone in existence have one, if you really don't want a touchscreen version, they can be had at any retailer in America for like $5-10.