When the latest Generation change was made, one brother commented at the WT study that "it may not make sense, but we just have to accept it becase they [the GB] are the ones that have God's spirit."
Yes, and it is amazing that displaying this credulous attituded is equated with spirituality itself. Although, the words "theocratic" and "spiritual" are used interchangeably. When a brother makes the kind of comment you just referenced; they are described as being "theocratic".
With this thought process in place, the GB can indeed make very sweeping and grandiose statements without any substantative Scriptural backing. The rank and file have been indoctrinated to believe that as the end draws close; the GB is going to be giving them "directives" and "instructions" in order to safeguard their faith. It is easy to see that such "directives" are considered to be new revelations from Jehovah that do not have to have any Scriptural backing, per se. This is where it gets really interesting, and perhaps frightening. Judging from history, this is the tipping point when cultic groups make their biggest blunders.