According to the WT, the ENTIRE book of Revelations is figurative or symbolic, except for the number "144,000"... that would need be a literal number in order for the GB to retain their authority.
But the main reason they are not ready to admit that "144,000" is NOT literal is becaused they have so much invested in this doctrine, that doing so would seriously diminish the sense of urgency required to keep the field service hours up.