Safety critical software is mostly a compliance dance that incidentally produces artifacts with lower defect rates than usual. LLMs can help with safety critical code as long as a human signs their name that they are responsible for its behavior.

When I'm sitting in the plane that has CAS firmware, I'd like to think it wasn't written by an LLM and that my death in the case of a CAS failure isn't chalked up to "some engineer somewhere gets in trouble".