SBF (They could) argue that this is not a central JW doctrine.
Well they certainly couldn’t argue that. Without 1914 the governing body have no authority.
Watchtowers quoted drivel really doesn’t apply because the exodus “generation” referred to is obviously the typical familial generation - in other words that generation were all the children of one man, Jacob, regardless of their ages or when they were born or died.
good rebuttal by the way OP