I'm a uni lecturer in the humanities. First of all, nobody is suggesting that students and academics shouldn't use AI at all. It's a powerful tool with a lot to offer. For example, as someone who is very experienced in writing academic articles, I use it a lot, to help get me started in rephrasing an awkward sentence, or to check the flow of an article I'm writing - most importantly, with my oversight at every stage, both to write good accurate prompts and to evaluate the output and to use it as a stage in the process of writing, not just a copy paste. Generally speaking as long as the task is about the writing itself and not about the content, it can be very helpful or a number of tasks, and I just spent a couple of hours showing a PhD student how to use it for some of the tasks that she would have paid a human editor to do less well a few years back. It's also concretely helped me to write more efficiently by helping me to organize research projects.
However. The problem with many (actually most) weaker students is that they see AI as a solution for everything. They don't realise the difference between form and content, and just cut and paste anything that AI offers them, because it "looks" convincing, even though the content is repetitive and shallow BS.
I now automatically use AI to check almost all undergraduate work for signs of AI generation - I work with the AI to make a good prompt that looks at a number of different parameters, and if the AI use is egregious, I also use the AI to write a response, which frankly saves me from spending ten times as long marking the work as the student spent writing it.
Unlike copy paste from Wikipedia which was the equivalent of AI BS ten years ago, now it's harder to take students to the disciplinary committee because it's difficult to prove AI use. However, if they really didn't do the work themselves, the quality is usually so low that that is enough that they won't pass, and I write extensive feedback pointing out how shallow their work is.
More pressing is the need for training for students so they understand how to do intellectual work in an environment where AI is a fact of life.