Yes, it's known as "the sunk-cost fallacy": The more you have invested in something, the more sacrifices you have made for it, the less likely you will objectively evaluate it and the more likely you will feel more convinced about it because the alternative view that you are wrong is too horrible to live with.
Well said Steve2
The top GB men will bullshit up something as they always have done in an effort to keep the organization on going and realistically part of that is for themselves.
Going back to people such as J Rutherford and the men who followed him these were the men who had so much to gain out the organization than anyone else, so one should assume the reasons and drive behind their individual efforts.