The reasoning behind this is that the Jews were selected by God and had to remain Jews despite their evil priests and kings. Likewise, the JWs are selected by God and we need to stay in the arc, good or bad.
I'm calling bullshit on that.
When Jews lived during the reigns of "bad kings" they were individually morally culpable if they went with the status quo.
The modern GB of JWs are "bad kings."
Every single "hero of the Bible" was an individual that took a stand against the hypocrisy and corruption of the religious and political leaders of Israel and Judah.
Take a stand against the hypocrisy and corruption of the religious and political leaders of the current WTBTS.
You'll be a hero. You'll probably also get yourself killed (spiritually), but you'll be a hero.
Let's review: It's a cult!