By using some ML model to spit out text for you, will you learn how to write well? How to write a good essay? None of that. During the act of writing those, the student is supposed to put in effort and thing of well worded phrases, using the parts of their brain, which are responsible for language processing. Without actual practice, the exam will come and the student will fail. They wont have a bullshit generator at hand, that generates speech, which sufficient sounds meaningful, when they are in an actual discussion "over the table". Even if they did, who would listen, if all they do is get out their phone and read some generated bullshit from it, that does not follow along with what was previously said?

Being able to have a good discussion is a life-long valuable skill. Not practicing it will cost sooner or later.