But whether any of this is essential knowledge in a particular field or profession is contestable. It was contestable before Large Language Models were invented, but it becomes especially contestable now.
I can imagine a scenario in which professor Jain’s computer science course turns out to be useless knowledge for the vast majority of software engineers. The students that he thinks are cheating may be better qualified to do the job. I am not saying that this is certainly going to be the case. But do not rule out such a scenario.