I agree to the practical part of this, with two nuances:

The full data of what's in an LLM's "consciousness" is the conversation context. Just because it isn't hidden, doesn't necessarily mean it doesn't contain information you've overlooked.

Asking "why did you do that" won't reveal anything new, but it might surface some amount of relevant information (or it hallucinates, it depends which LLM you're using). "Analyse recent context and provide a reasonable hypothesis on what went wrong" might do a bit better. Just be aware that llm hypotheses can still be off quite a bit, and really need to be tested or confirmed in some manner. (preferably not by doing even more damage)

Just because you shouldn't anthropomorphize, doesn't mean an english capable LLM doesn't have a valid answer to an english string; it just means the answer might not be what you expected from a human.