Because code isn't prose. It has a much more structured, "correct" form than prose. After adhering to a high level structure of a program and applying linter rules, there's really not that much variance between code (In terms of how it reads, not correctness or performance). LLM code without guard rails can get really bad, but with some guard rails it's generally not worse than the average code I'd read before LLMs. I'm used to code being generally bad.

Books or blogs on the other hand are different. Every person writes differently, and the writing style is part of the experience. The same scene or concept can be described in an infinite number of ways. But LLM prose ends up very samey. You get the same sentence structure, the same key words, the same metaphors, the same similes, the same rough distribution of word usage. It's very average, and it's boring. And it frequently reads like a corporate blog.

I don't like LLM prose pretending to be human with emotions and affection.

I like LLM generated code that works in a technical way. Just like I like LLM prose that tells me the facts I want to know. But no fluff.

While it's true many people don't care about code quality, it is completely nonsense to think that Rust was chosen simply because "we wouldn't be able to understand it anyway."

> much more prose than code to train on

This is completely irrelevant. An LLM's voice is not influenced by its at-scale training data. LLM-prose is the result of human feedback training rewarding it for making every single sentence sound like a YouTube or BuzzFeed headline, which is effective against a large portion of the population who get dopamine hits from such clickbait style of writing, and completely infuriating to the portion who recognize it for what it is.

LLM code is also infuriating, but for a different reason, because it is not reinforced in exactly the same way. However, people are fine with it because they don't read it. If they actually read the dogshit code an LLM produces, and were capable of understanding it, they would be infuriated by it too.