Automation in its current ability to replace labor is rather ubiquitous. It doesn't replace a means of labor entirely as much as it diminishes the work necessary to ultimately provide the good or service - think what the industrial did for farming over the centuries and how labor shifted in regards there. Before the industrial revolution we had an agrarian economy where almost everyone farmed. Now practically nobody does but products of which are provided more than ever.

AI allows anyone to write with a similar style to that of another currently so long as there is enough of a sample size to provide to train the AI. I don't think AI will replace the best writers of fiction but it will be used as a tool to produce similar content quicker. Depending on the type of fiction this will be easier to do but for creating unique narratives AI will likely not provide as much assistance beyond some form of a useful template. Ai or automation in general is more likely to reduce work towards documentation or perhaps non-fiction pieces.