WebMD has been like this well before current iterations of LLMs. Pretty much any symptom you looked up would very meme-like say "it could be cancer". Only, it wasn't trying to be a meme. I always saw it more of a CYA on webMD's part though, without trying to sound authoritative like LLMs do.
https://gutenberg.org/files/308/308-h/308-h.htm
Published 1889
Food, bitter beer, exercise, early bedtimes and "stop stuffing your head with things you don't understand".
> I followed the directions, with the happy result—speaking for myself—that my life was preserved, and is still going on.
I read the book as part of my English - II in school, but no part stuck to me as much as the Liver cure for children.