I can't see a Samsonesque self-sacrifice by the GB. One, they're strike me as being pretty cowardly. They're great at having others make sacrifices, but aren't that keen on doing it themselves. Two, I imagine they have comfortable living quarters and their regularly provided dinners are probably pretty good. Not to mention the added privileges like flying first class to be chauffeured to a convention where everyone hangs on their every word, five star hotel accommodation, etc. Also not to mention, the special envelopes handed to them by visitors to Bethel.
Let's face it, they have it pretty good and they probably believe in their lifestyle more than they believe in their eschatology. They'll knuckle down and do what the government wants*, as long as they can keep the lifestyle to which they are accustomed.
*Remember, they dropped the sacrosanct door to door work, their main distinction, at the merest hint that the government might have a problem with it, during the lockdowns.