For JWs, the important thing is not that the GB had something right or wrong. The important thing is that they accepted whatever was being told to them and did not challenge it, even if they did not agree with it. They must accept that Jehovah will frequently mislead his people by giving the GB the wrong information or knowledge.
If you come to the perfectly reasonable conclusion that a group of men who have to constantly correct themselves may not be getting their information direct from God... you are an apostate. An opposer. An enemy. You are the one type of person they cannot allow in their community, and you must be removed before you can spread your dangerous ideas.