I don't want to defend or excuse them.
I'm just trying to picture myself in their shoes. If they think they are truly God's organization, trying to discern what God wants and then laying down that law to the rank and file... Then when it turns out badly for individuals (e.g. people dying for want of an organ transplant) they must feel, "Oh, that was our best understanding at the time, so even though it appears we were wrong, we have done no wrong. At least we don't believe in hell or the trinity! We're still the best source of light from Jehovah, even though there may be casualties along the way, those people chose to follow us and to give up their lives for Jehovah if need be -- we didn't hold a gun to their heads." Or something along those lines.
It's complete idiocy, but I feel sympathy for idiots too. I would not want to see the GB (or anyone) living in cardboard boxes on the streets of New York. Maybe a low-priced nursing home.