So God is testing his servants when they have to accept illogical teachings, just like the overlapping generations? And he was testing his organisations lojality during the time when vaccinations and transplants were forbidden? OK, I am sure God is very happy to know that thousands of loyal JWs diedto show their love and loyality to God and his organisation.
And now the loyal jws vill have to accept this histoty of the organisation without feeling disgust for the tragedies mentioned above. Maybe this is a test of the contempories aswell?
But, if it's only a question of loyality, why bother trying to explain such a teaching as the overlapping generations? It could easyly be stated: "Accept what we tell you, we don't have to tell you why you should believe this". That would be a much more effective test.