I have tried various models out for tasks from generating writing, to music to programming and am not impressed with the results, though they are certainly very interesting. At every step it will cheerfully tell you that it can do things then generate nonsense and present it as truth.
I would not describe current LLMs as able to generate essays on anything - they certainly can but they will be riddled with cliche, the average of the internet content they were trained on with no regard for quality and worst of all will contain incorrect or made up data.
AI slop is an accurate term when it comes to the writing ability of LLMs - yes it is superficially impressive in mimicking human writing, but it is usually vapid or worse wrong in important ways, because again, it has no concept of right and wrong or model of the world which it attempts to make the generated writing conform to, it just gets stuck with some very simple tasks, and often happily generates entirely bogus data (for example ask it for a CSV or table of data or to reproduce the notes of a famous piece of music which should be in its training data).
Perhaps this will be solved, though after a couple of years of effort and a lot of money spent with very little progress I'm skeptical.