> You need to hand it in so that the teacher understand where to put in more effort, but if it wasn't for that need, they'd probably have you throw it away after writing it.
I am not sure how your literature classes went, but all of my essays were graded and feedback was provided to me specifically so I can get better. Perhaps my previously reply was too long winded, but feedback on your essay on how to improve it is the exact use case I gave as an example.
Sure, let's say you used AI to correct your mistakes before you submitted it, now you can't get that feedback, and again, you're missing out on learning.