Just use search or books
Many argue an LLM adds hallucination risk and overhead for a static corpus, and that Kiwix, plain search, embeddings or paper manuals would be smaller and more trustworthy.
LLM as grounded search interface
Others say an LLM over a curated local library is a useful way to find and chain sources you wouldn't know to search for, as long as answers cite sources you then read.
Power and practicality doubts
Several question running GPU-hungry models in a real emergency without electricity, and say survival skills should be learned and practiced rather than looked up.