I also limit myself on how many applications I see in a day (no more than 20 on a busy day, 50 on a not so busy day) so that I give every resume a fair read. A team can only do so much in a day. It's disheartening when you see a blatant AI use (and it goes into the trash bin right away).
If recruiting departments really suffer at parsing about 50 apps per day per recruiter, I can see why this got so bad so quickly.
Afaik, any kind of slush-pile reading (including grading, which is probably the best researched) tends to get less fair as the process wears on the reader.
GP isn't optimizing for finishing the pile, but for making the most of what's in it.
I want to give everyone a fair shake (including reading cover letters) and for me, resume fatigue sets in if I read more than 50.