It's a Pascal's wager. If you're convinced Armageddon is going to happen at some point, then you should do all you can to prepare for it happening in your lifetime. And that approach is explicitly encouraged in the Bible: "You do not know the day or hour", etc.

Right "you do not know the day or the hour", not "you know that the day will be sometime between 2026 and 2076". I understand being prepared and whatnot. I don't understand the certainty of the date. Even the Bible says that it's unknown.