> I can never hope to express myself clearly.

Really? I seriously believe that people that think this way underestimate their self, especially if they're going to be sharing something valuable.

> How do we make room for their use as a cognitive-prosthesis (if you will allow such framing) without losing humane-ness?

As many others have expressed, we'd love to read the prompt (and the model's chain of thought if you have it). This scenario is like talking through a person translating things to each other, except from the recipient's perspective, the translator is absent from the conversation entirely.

Additionally, disclosing LLM usage is low hanging fruit to differentiate yourself from the 100x other people who "do not review and vouch for things written on their behalf by LLMs". If the LLM converted something unreadable (whether due to a language barrier or incoherence) to text relevant to people on the other end, and THEN they disregard it anyway, the fault is not on you for them dismissing the writing too early.