Most masons have no idea what's going on. The high degree masons do, but it takes a long time and effort to get there and they don't think it's worth loosing everything. Just for sharing secrets outside the club.
“I perpetrated a huge fraud on the American public, which I am now about to detail, involving the United States government and NASA, that the moon landings were faked, that the moon landings ALL were faked, and that I was the person who filmed it” - Stanley Kubrick confession
Most masons have no idea what's going on. The high degree masons do, but it takes a long time and effort to get there and they don't think it's worth loosing everything. Just for sharing secrets outside the club.
Why not leak it all on their death beds?
Maybe they know about what happens after we die.
Fear of Final Impalement?
Some manage to do just that.