Writing a dissertation is a completely different kind of thing to graded homework assignments. A dissertation isn't graded, or even if it is, noone cares about the grade.
The work in writing a good dissertation is done prior to writing, the writing is just wrapping up. If you can write a good dissertation with AI, so much for the better.
Meanwhile, the work in writing a bad dissertation is never done at all and the dissertation is a more-or-less-undedectably plagiarized document read by at most two people (and perhaps noone, including the writer). This process is a waste of time and accelerating it with AI will change nothing other than saving a few hours for people who wanted a degree (and definitely would have gotten it without AI) without doing any research.
The work in writing a good dissertation is done prior to writing, the writing is just wrapping up. If you can write a good dissertation with AI, so much for the better.
Meanwhile, the work in writing a bad dissertation is never done at all and the dissertation is a more-or-less-undedectably plagiarized document read by at most two people (and perhaps noone, including the writer). This process is a waste of time and accelerating it with AI will change nothing other than saving a few hours for people who wanted a degree (and definitely would have gotten it without AI) without doing any research.