You have done well at mimicking Le Guin's style here, but this isn't actually from Earthsea, is it? Did you write this yourself? Or this being Hacker News, did you ask an LLM to continue the except above?
I don't think Le Guin would have said that reality as a complete concept is something like an unspeakable horror, and I'm not sure I like the idea of presenting a creative fictional except as if it's legitimate.