I'd still assert that "fables" is merely inaccurate, but I will accept this can be a matter of opinion. However you just quoted "apocalyptic fables" as though describing it as apocalyptic were somehow relevant to the negative connotation. Book of Revelation isn't just any apocalyptic literature, it's prototypical of the genre.[1] Apocalypse is the literally a Greek-derived word for revelation.[2]

[1] https://en.wikipedia.org/wiki/Apocalyptic_literature

[2] https://en.wikipedia.org/wiki/Book_of_Revelation