From my observations, I think many (especially older) JW's hold through the stupid doctrinal changes because they can't admit the alternative.
I had wished the JW kingdom hope was true, I needed it to be true. I'm 5th generation and my parents, grandparents, great grand.....ect needed it to be true. I have watched many "faithful" relatives hang on and die disappointed. But our false hopes and needs have nothing to do with reality. It was hard to accept that, but I did.
I see my younger relatives in there 20's. Some barely attend anymore, some are pioneering with their little children. One passed up a better job to not miss meetings. >sigh<
The GB, DO's, CO's all honor the traditions of the Organization because it is too scary to face the fact that much of their life was spent for nothing. Popularity (peer pressure) is a great motivator. The GB gets comfort from 7 million followers ..."see...lot's of others think we are right". But many of these high level leaders know better, or at least should suspect something wrong, be brave and invetigate and take action. But that would mean admitting that their heroes (CTRussel, JFR, Knorr, Freddie) were wrong. Who wants to give up on their heroes?