The whole point of this site is for people to express their opinions, and torginus took the time to write a thoughtful comment anout LLMs and how they might help both authors and readers.
As for your point about serendipity, torginus never said that he didn't wander book stores and libraries looking for books he wouldn't have been previously exposed to.
Based on the post, I'm sure they understood the basics of reading a variety of books, both good and bad -- there is no need to get judgemental.
I discovered absolutely great books by moving slowly along the shelves of a library or a bookshop.
And you need to read bad books to understand the great ones.