I want to take a stab at being more specific about why I think this is bad. The easy answer is just that this is almost always undisclosed AI use, so the higher % AI people are lying, presenting AI work as their own work. Beyond that, I do feel sad about the breakdown of the relationship between 'long text with broad vocabulary and syntax' and 'real intellectual work'. If I read a dissertation from 5 years ago, it can only be well-written if someone who is reasonably smart and knowledgeable put that work in. Therefore, if it's well-written it's probably worth reading. That signal is gone. Most stuff isn't worth reading, and authors have lost one way to signal that their stuff is different.
That's not to say that someone who uses disclosed AI is doing anything wrong, even if there's a big cost to the new equilibrium. It's obviously very useful. And some smart and knowledgeable people can't write, so my previous strategy filtered out good work by people who can't write. I don't think it's viable to ask for anything other than "disclose AI use".
...but, once you've disclosed it, I probably won't read it, because I don't have a good way to assess at a glance if it's worth my time.
Out of a sample of 100 Doctor of Education dissertations, over half contained some amount of AI-generated text.
Research done in collaboration with Pangram. Link to full paper in replies.