That's not my read, at least not if you give them enough credit to use their software.
My read is any LLM use should be opaque to them. You should be able to explain your bug find in your own words, have formatted as the project expects, not have any LLM generated comments (which trend towards being useless anyways)
The wording of the post is very clever, if you're green you read it and you say "I'm banned because I use Claude". If you're experienced enough you can read the message between the lines: "if you use LLMs, it should still have gone through your brain before it reaches mine, so I'm not turned into a meat puppet by proxy"
The fact we have different interpretations is the reason why it should be clarified.
Some people reject AI on a matter of principle. They may have a problem with the energy cost, the idea that AI companies are stealing the world knowledge for their own profit, that any use of LLMs will make you stupid, or that it does more harm than good overall. The code of conduct links to a short story by Isaac Asimov, you typically don't do that when your motives are purely technical.