I tried to use an LLM for assistance with reversing some embedded code and agree with this. I had built up a pretty decent model of what was going on before starting. It was able to explain what was going on in this one perplexing function quite well but when I'd feed it decent sized blocks of code it would hallucinate like crazy. But I was quite happy with the performance at finding the basic library and ROM functions and annotating them correctly. I think it is all in how you use it.