Fundamentally, I know that HN has plenty of people who will react with "ha-ha, human authors should pack their bags", just like what we keep telling mathematicians, because we see the discipline as just another market that can be conquered by automation or another benchmark to track. But literature, similarly to most other forms of higher-brow entertainment, isn't just about reducing unit-cost or hacking engagement metrics. For the same reason why a genuine van Gogh painting is worth a lot more than a nearly-perfect replica, people who care about the craft usually care about it telling genuine human stories and celebrating the author as much as the result.
Now, the mass consumer may not care; if you have an infinite Harry Potter sequel machine, many will partake. But then, I guess the question is, if you build the sequel machine, are you leaving the world better off or not? Do you want to be interacting exclusively with machines down the line? And if there's no inherent value to humanity, why should the machines be compelled to interact with you?