Wouldn't it still be easier to type out the entire AI generated assignment than to come up with an assignment and then type out the assignment you came up with yourself?
Obviously typing from start to finish with few edits is also a "failed" result in such a program. Someone actually writing an essay should be creating structure, taking notes, rearranging paragraphs etc.
Then again you have a good point. Often you blat out an essay and then edit it. Same thing goes with typing in an AI generated template.