> The book of Revelation also cites various signs that are metaphorical enough to be applied to just about anything.
If someone plans to, they should first read Revelation 22:18–19.
And Revelations isn’t the only prophetic work. Try Ezekiel.
> It's pointless to cite the Bible to defend a theological position
Understandable, but citing the Bible is fairly important in theology, though it should be done within context.
Sure, Judaism was word of mouth a long time, and that’s great. I personally can’t remember much, so I think referencing text is fine.