They don’t, at least not any more. Andrew Kelley has explicitly stated that he sees the value of using LLMs to uncover bugs. Inspired by sqllite project.

https://youtu.be/zwi5b5xSsKA?is=PTjJJjSnVMdRuZag

They may just be taking the slow route of rejecting by default until they can be sure that the usage of LLMs provides long term value. I don’t see anything wrong with that. If you’re writing robust software, using LLMs at this stage is a bit of a gamble. We don’t fully know the long term effects on code quality yet.

Ah, so yet another language in the long line of "I'm smart enough to use this but you the user are not"