Then the value of many ancient texts must be close to zero, because we often know nothing about the people who wrote them. In many cases even our guesses for where and when they were written differ by multiple centuries or thousands of kilometers.
With AI writing the answer is that everything is randomly averaged and thus trivial.
I’ve read many ancient texts with great delight, and not once have I tried to “build a mental model” of their authors. It’s a dimension of literary analysis that has never interested me, even for authors (such as Kafka) whose personal lives are generally considered inseparable from their works.
The work stands on its own for me… or doesn’t, in which case learning about the circumstances of whoever wrote it won’t save it in my eyes.
This is where imagination fills the gap and makes it interesting to think about.