no one made the claim that gpt4 is the only tool that should be used
Forcing an educator to choose it or a book demonstrates the book is in fact the best education tool unless the educator is going to double down and say they'd teach from a chatbot over a textbook.
But if I did sign up for a college course i would expect a more systematic presentation of the material than "whatever random thing I thought to ask an AI."
Not to mention just the other day I asked Chatgpt 4 accounting questions and it gave the wrong answer, and only interrogating it prompted it to correct itself.
The hardest thing about learning a new concept/idea is to get started. GPT lowers the barrier of entry, and you can use the knowledge you got to tackle other learning tools and fix the parts GPT got wrong.