FTA: "If we offload the RCA learning/categorization part to the LLM (whatever that means), we wouldn't be able to make much progress in the enhancing reliability and safety part."

But you don't offload it in the sense that you expect the tool to completely take the wheel.

You ask it for suggestions to inform a human. If the suggestions turn out to only be a distraction in your environment then you abandon the tool.

For plenty of environments the suggestions will be hugely useful and save you valuable time during an ongoing outage.