Teachers who grade essays are not even reading them most of the time though. Maybe theyll read the first and last sentence and quickly skim the rest. The LLM will at least read it. The reality is the current education system doesnt work particularly well. Too many students not enough teachers
Doing it well does, sure. That just means that most teachers are not grading essays well. Obviously just speaking from anecdotes here but my ~10 teachers in high school who graded essays only 2 actually read them
It's much faster to grade/give feedback on a piece of work than it is to verify the accuracy/comprehensiveness of existing grading/feedback.