define true belief.
In my day in the 50s, some had pet beliefs, mine based on Rev 11: !8, god will destroy war mongers. others were virulent anti clergy, because of abuse they suffered.
I now see belief in the GB among elders and elderly to sustain their hope, hope is not faith or belief. however.
As was said, wt wants [us] old ones to go, take their embarrassing knowledge with them, ,but leave their estates to wt $ inc. (or elders who have been known to be fellow-harvesters).
how many are true believers, or just doing the best bet , reverse insurance option? Playing for the crowd? on a power trip? hard to put a figure on the unknown.