While some content shown in some place like OpenAI's demo (which, like any other company they would use to market their stuff). I suspect it is the best case with a lot of training data for the auto-generative algorithms to work. In other words, what we see in such showcases is the best stuff pinpointed on some focused area, nothing generic. AI will take much more time to be there.
By the time AI reaches that level for writing, it will be at similar or better levels for many other tasks (note, writing is an intellectually difficult task, and nuanced writing is devilishly difficult), so many other things will probably be at risk before it. I would not worry too much about it just yet. Future - we shall see.