Thank you very much for posting Paul, we continue to speculate here on the motivation of the JW governing body because we have little concrete information. You though have supplied some hard evidence from the horses mouth so to speak, by correspondence from a GB member.
Ray discusses the conundrum of recognising the weaknesses of certain JW doctrines but strikingly all at HQ seem wedded to the concept of a divine rightness of The Organisation. In the minds of the GB and through their historical activity going back to Rutherford, it seems to me that they have sacralised the organisation (exactly as they do the Bible) to cultivate it as the product of God's hand. In a similar way the Catholic Church had bamboozled the poor by using extravagantly decorated cathedrals and churches to supply them with an apparent tangible token of the divine.
I remember so often Catholic priests and other religious men were mocked for holding on to their church's teachings even though not believing and yet were tied to the way of life within it. Cannot we see the same hypocrisy written larger in the leaders of the JW religion who appear to fulfil the obligations of office but probably remain internally in denial as to JW dogma, stymied because they would lose all that they value if they left; i.e. the prestige and executive lifestyle with all its earthly comforts and welfare.
Like others on this site, I lost a lot when I woke up and left. Apart from Ray Franz, there seem to be none of the present GB who put truth and personal honour ahead of their cushy life at the top.