By falsely claiming that the original "Millions now living will never die" idea ( 1918, page 425-6 in the "Proclaimer book") was happening in the 1940, -a lie-, wt is trying to avoid making the earthly class an overlapping generation too.
A contemporary of the phonograph campaign would now be ~> 57 years old. whereas a baby when WTBtS was appointed the F&DS on the strength of the prophetic "World has ended, Millions --will not die" is 100+, probably dead, a candidate for overlapping new light.
WT probably thinks one overlapping generation is already too much, and is trying to erase it's track. record. but it is recorded. You will be judged by every word you say or not. now.