It's a lot easier to double-check, cross-reference, or test the validity of advice given by a gpt. It has no authority, no persuasion mechanisms, and its opinions are there in plain text ready to be picked apart. You can ask it for references and non-confrontationally challenge it on the things you're sceptical about. It generally avoids woo in my experience though it's hardly always correct in specific advice, it can definitely point you in productive directions. Which is completely different from discussing anything health with a homeopath, who at best will try to get you to avoid productive treatment and at worst poison you.