FFGhost - "...Growth is not the raison d'etre of the WTS. Control is their motivation..."
Not quite.
Being "God's Exclusive Earthly Organization" is the WTS's raison d'etre.
Everything they do...
...everything...
...is, ultimately, done in the service of maintaining that fiction.
Without it - by their own internal rules and rhetoric - the WTS has no theological right to even exist...
...and for the leadership, that possibility is unthinkable (for a whole shit-ton of reasons).
Which leads to their secondary motivation... the Org's continued survival...
...after all, "God's Exclusive Earthly Organization" can't die... if it did, it wouldn't be "God's Exclusive Earthly Organization", and since that's unthinkable...
... they are therefore compelled to take any and all actions necessary to ensure said survival.
The irony (that would be fucking hilarious if it wasn't so facepalming) is that as time goes on, and they make bigger and bigger blunders, and their own inability to adapt (for all kinds of reasons) paints them ever more tightly into an ideological and legal corner...
...the very actions that they feel they have no choice but to take in order to survive cannot help but - ultimately - actively undermine the Organizational claim.