The problem is that the gb is an entity, the sum of the parts. An individual member expressing doubts would be treated as an individual, elder, co, do etc who did the same. There is a a curve representing the degree of secrecy surounding such a dismissal. It increases with the seniority of the offender.
What I am saying is that there is no more room for a gb member to freely express himself than there is for a r & f member. The difference is the spin on the matter increases as the ladder gets taller.