From what I know, not everything the WTS teaches is 100% foolproof correct.
Jesus is mankind's mediator to God and it is clear in the Bible. I teach it from the platform. I end my prayers at the meetings with Jesus Christ as our mediator...amen! Everyone in the hall says "amen" to that, so they all must agree regardless if the WTS says otherwise. Not a single elder/CO/DO has ever stopped me from saying so. I think because they too don't believe it. Honestly, I don't think many JWs really buy into that reasoning that Jesus is the mediator only for the annointed. Really, they don't.
Sure, the typical R&F may somehow try to understand the reasoning of the WTS for this topic. But really, not every JW believes it. I should know. I talked with several about this.
Alligator Wisdom (aka Brother NOT Exerting Vigorously)