If the wtbts/gb were to ever make such a delineation, they would absolutely lose all their power and or their mystic.
The switching back and forth between what applies to the anointed and the r and f. between what is literal and what is not literal is what gives them the power. Only they can make that distinction! Only they have such deep insight to the bible! Therefore WE NEED them or we are lost!--Problem solved!
Given the FACT that the bible, as we know it, is nothing more than Hebrew mythology it can be applied anyway one wants to believe or be convinced to believe. IMHO, I don't believe many jw's that truly believe everything that is in the bible. Even when I was a gong hoo jw for over 50 years, I had a very difficult time truly believing in those mythological bullsh*t stories!
talking snake, noah's floating zoo, walls falling down at a trumpet blast, red sea just parting, etc., etc.!
just saying!