Okay, these are fair responses in pointing out the hypocrisy angle.
I was moved to start the topic by reading many posts (such as some here) stating that the Society must not think the end will come before they would finish the HQ, and that's what I wanted to object to.
I do think the leadership expects the end soon, but I think the reason they aren't waiting until after the Big A is that they probably already waited too long and the old Brooklyn buildings were becoming a hardship for them. It also seems that they are afraid of pre-Armageddon chaos, like the 9/11 attacks which reputedly frightened them into wanting to leave the city.