professors using ai for grading

hello! i was just wondering if anyone's professors use ai to grade their work, mainly papers. my professor has been very transparent about using ai to grade our essays where he and the ta grade the essay and then cross check with chatgpt to see if the scores line up. but for our final paper it was a personal paper written off of our own experiences and when our grade was posted the ta put in a comment outlining our score but it was seemingly similar to how chatgpt grades - i did not receive the best score and was just genuinely confused about some of the comments because ai is extremely subjective and this was a personal paper. anyways just wanted to get some opinions about using ai to grade things. thanks!

side note: doesn't this just encourage students to use ai to write their papers so that it fits with the ai generated grading???

edit: prof puts in his rubric and asks chat gpt to grade it based off of the rubric he puts in and then compares it with his and the tas grading. but my ta did say that they did not use ai to grade the final paper