why are JWs acting as if the new
data rules mean an absolute end to
the collection any meaningful data
on the ministry?
If Watchtower would use the Mormon approach they would knock down one of their default knock down defenses in courts and legal procedures: all JW activities are strictly personal activities by individual JW.
They argue this in Russian courts wrt meetings and preaching.
They argue this in USA courts when it comes to elders handling CSA cases.
The cart witnessing instructions tell the JW to stress that their activities with the cart are personal activities of anyone asks, and any permits should be put to a personal name rather than the congregation.
They tried arguing preaching is wholly personal in Europe to get out from under GDPR.
Hell, it can be said that even appointing elders is a personal activity of COs.
Why does Watchtower do this? To evade liability and responsibility. They don't want anyone coming after them or their money.
Adopting the Mormon GDPR procedures would tell everyone that preaching is a centrally organized corporate effort.
(Well, since the courts everywhere already saw through the 'personal activity' nonsense they might just as well do as Mormons do wrt GDPR)