Re frazzled UBM , the Society doesn't need to defend it's position , any more than the North Korean leader Kim Jong-Un needs to defend his divine appointment as the Dear Leader ( or whatever his title is. ) They just assert it , and if anyone disagrees or questions it then they get disfellowshipped (JW) or thrown into a concentration camp together with all their family (North Korea). At least in bible times you had to raise people from the dead or heal a few sick people or show other similar evidence of divine backing. Nowadays the hurdle is a bit lower and divine appointments are quite useful in that there isn't any real need to show any proof and if you can convince enough people and threaten any dissenters then then you literally have a job for life , and if you play your cards right , plenty of women and Rolls Royces as well.
Re where is Jesus , I think the WTBTS official position is that he is kind of hanging around in the vicinity of the earth waiting for Jehovah to give the OK for Armageddon to come and kill 99.9% of the earths population. A bit like Banquo's ghost hovering around in the background ready to spoil a party. In the meantime he is "actively" directing the preaching work. But they seem a bit vague on his ( never "His" with the WTBTS ) actual details or location.
But in fairness Jesus has always been something of a marginal figure with the WTBTS - it's really all about the Organisation first. He used to get a lot of emphasis in Russels time but since he came in 1918 or 1919 and appointed the society as the Faithful Slave , he's been pushed very much to a back role. Other than at Memorial times , he is largely forgotten about , other than as "an example" to witnesses ( well , in his preaching rather than anything else he did. ) We used to have an old ex-Catholic sister in our congregation who occasionally would give answers in the Watchtower about how much she loved Jesus & she was regarded as a bit of a fruitcake , a bit of an embarrassment - cough , move on to the next answer please. I guess that pretty much sums up Jesus's role as far as the WTBTS is concerned.
...OUTLAW