troubled,
You make some good points - however, it is possible to analyse information objectively once one has trained oneself to do that. For example, the scientific method can be used to analyse the validity of certain theories or hypotheses. It is simply not true that all information is equally valid and that its meaning depends on interpretation. There are well established logical devices that can be used to decide whether something is accurate, reasonable, verifiable, etc.
JWs may discount information that conflicts with the central dogma of their religion - that the GB speaks for God. However, objective analysis demonstrates that the GB does not speak for God and that they are in fact prepared to lie, as in the UN thing.
The WTS could, for example, simply publish all information relating to its application to the UN. Why doesn't it do that? Presumably it is because it understands only too well that doing so now would show them to be (i) hypocrites and (ii) liars. If what you said was correct, then it could simply publish everything and then argue that its interpretation of that material is such that the WTS did no wrong.
Lionel