JW's are changing before our eyes.
In decades past, you couldn't be a CO or a missionary unless you helped bring at least one person to the point of baptism. It used to be that the preaching work WAS about saving lives.
Now, it has taken the place of giving a cow to your local Levitical priest to sacrifice to Jehovah.
As already alluded to, there is a VERY pragmatic reason for the GB to frame the preaching work this way; its because the door to door work is an activity with diminishing returns.
So now they must condition their flock to view preaching as a way to show Jehovah how much they care. And you know how Jehovah shows he cares? He doesn't bring Armageddon so that you can REALLY show how much you care.
Because it at least made a little sense that Armageddon was being delayed so that some "right hearted"™ ones could respond to the preaching.
So it seems pretty clear that fewer and fewer are responding, and
It seems pretty clear that JW's have covered the entire earth with their witness, so long as you don't count a couple billion Chinese and Muslim's on two continents, and
It's just about time for Armageddon, except
Jehovah now wants to see how much you REALLY care and love him, by preaching to people who have already made up their minds.
This is real, unadulterated groping in the dark by the GB.