By design it produces something very average - literally so. So if you are looking for a type of information where you want the numerically most likely answer, or something that is easily available, then fine (cinema listings, train times, bog standard well-known scientific explanations, etc. etc.) It works at the mean, so it gives you average output. That’s great, if what you want is the kind of information which converges at the mean.
Ask it the kind of question one might ask an agony aunt, and it will give you back the most averagely agony auntish answer, like the equivalent of averaging a thousand agony aunts.
It quite literally produces mediocrity. The more mediocre the information it gives you back, the better. That’s the whole idea; the entire model. It gives you something that of its very nature is completely average. It will write you an average email, an average letter, an average university essay, everything as bland and average as possible. This is great, obviously, if you’re after bland mediocrity. It isn’t going to write you a stunning essay, a brilliant set of thoughts, an elegant letter. It isn’t going to give you brilliant advice that you couldn’t get elsewhere. (It’s going to give you exactly all the most average pop-psychology advice you could have got anywhere else in the internet, just faster and in a more blandly servile tone.)
Putting it gently, if you are happy with mediocrity, or you don’t have any need for anything that isn’t average, or don’t really need to care about nuance or depth, then AI is fab. You don’t need nuance or depth if you want a week’s worth of recipes using tomato, cheese and wraps, or if you write average marketing output for a living, or the emails you want it to write are ordinary bland ones to school or the head of accounts at work.
However, if you want to write that really stunning first-class essay, that really heartfelt letter, get some really good advice from an expert, know a subject really well, create something new, need to rely on top-notch information and insight or really in-demand skills not many people have, you won’t find any of these using an AI.