The author put his name and reputation to it. If it's excellent work, it's excellent work. If it's slop, it's slop.
For at least the past 5 years, Amazon.com has been completely flooded with throwaway brand names churned out from random sequences of characters selling white-labelled products. The ones that do poorly get discarded and replaced, and the ones that find traction get to climb the rankings.
Do you think the same doesn't apply to "authors" of books, social media posts, and even academic papers in 2026? It doesn't matter if someone's staked their reputation unless their reputation is already widely known and trusted to begin with.
The last time I looked into someone's complaint on HN about Chinese companies setting themselves up on Amazon with nonsense data and no way to contact them nor any theoretical method of holding them to account for misbehavior, I went to the product link the complaining comment provided and discovered that it was offered by a company whose registered place of business (listed on Amazon!) was obviously the poor owner's personal home address.
This book is presented as being written by a human. (In this case, a human I happen to know, which would add another dimension to my complaint, so let's imagine that weren't the case.) Maybe someday we'll live in a world where sticking a person's name at the top of a book doesn't carry the implication that they wrote the words in the book. That would make me sad for other reasons, but in any event, we don't live in that world right now, so for now, if you put a person's name on your book, you are claiming that that person wrote the book. If that's not true, you are lying, and like most people, I don't like being lied to.
It's not a perfect proxy, but I'm usually going to trust a domain expert over the confident idiot who constantly lies to me, hides and downplays mistakes, and flits around opposing positions like a drunken moth.
At this time, if I see a text is AI generated, I have to assume it is unsound and possibly even nefarious. There is way too much information assailing my daily life that I have no other rational choice.