Really good topic. Would the GB have this much impact if all its members were known as individual middle aged and elderly men with faces and names, their background histories and whether or not they were married etc?
My guess is that they would be in danger of being viewed as imperfect humans doing their best but prone to mistakes like the rest of us. They have actually admitted that God does not talk to them directly, which is why 'New Light' has to come out every few years to replace the doctrines they have got wrong.
The subtle way they have changed wording in the songs and the baptism oath placing the emphasis on obeying the Organisation rather than God would raise a few concerns on the issue of idolatry and worshipping men which the bible tells us is deffinately not on. Much better to remain faceless and rather mystical so nobody can actually relate to you.