This is so true that J.W.'s feel that the W.T. and the publications trump the Bible. On a judicial committee, as an elder, I brought in a scripture that I thought had a bearing on the case. My fellow elder told me that he didn't care what the scripture said, that he was going by what the Shepherd the Flock and the Watchtower had to say on the matter! Another instance is when I found out that the W.T. teaches that Christ is not the mediator for the other sheep. Reading the scripture concerning this at 1Tim 2:4, 5, it spoke to me, being of the other sheep, I felt that Christ is my mediator. My wife felt the same way as I did until she did research (if you can call it research) in the W.T. publications. She changed her mind and said that Christ is not her mediator.
I was an elder for 25 years, so I'm guilty of getting on the platform at the Kingdom Halls, Circuit Assemblies, and Conventions and quoting W.T. publications as the authority. "God forgive me!"