When Ray Franz left, pre Internet, that had ahuge effect for many years. If a heavy weight GB member left today, and went on the Net with all the dirt it would cause a bigger ripple.
The old blind cult members would still cling to it though, even such a momentous event would not finish the WT straight away.
This presentation of 1914 is typical of their mind control, in no way do they spell out how the doctrine is arrived at, they just take that as a given, when was the last time they laid the doctrine out for all to see, in all its glory ?
The last real mention of it in a teaching way is hidden at the back of the falsely titled "What does the Bible really teach?" book, in an Appendix !
Their primary doctrine and they have to tuck it away in case someone with a little bit of critical thinking skill says to themselves WTF?
Oh, they will hang on to 1914 alright, but they won't expose the doctrine for even the acolytes to see, they dare not.