TD,
The concept of "Bible prophecy" is not one of mainstream Christianity anymore either.
Being exposed only to the doctrine of the Watchtower and learning about the Bible and other religions through its filter can create what I call the "Marie Antoinette Effect." Especially upon leaving the JWs and rejecting all religion (which can be a fine thing to do), a problem can occur that we are left believing that all religion is like what we were exposed to from this very American, anglosphere-centric, Adventism-based cult. Many ex-Mormons born into that religion have a similar experience sometimes.
The idea that the Bible has a foretelling of world history in both the Old and New Testaments has been rejected by all mainstream Christianity. The Holocaust was the turning point for the revision of much Christian theology. Christianity's direct and indirect involvement in the Shoah led to the Christian-Jewish dialogues that began around 1950. Originally started (and actually initiated) by the Catholic Church, the dialogues created reform in all forms of Christian religion, even indirectly initiating Vatican II which changed Catholicism forever.
Teachings like supersessionism and rejection of the Jewish exegesis on their own Scriptures have been officially done away with in mainstream Christianity. This includes the idea of a foretold "march of nations" predicted in Daniel and other books. Such ideas actually played a part in the anti-Semitism that led up to the Holocaust, and thus the idea of such a forecast of Bible prophecy was dismissed from all major Christian denominations likely before most of us here were even born. Even the so-called "70 Weeks Prophecy" of Daniel has recently been rejected by mainstream Christianity as a prophecy about Jesus. For instance, the Catholic Church now teaches the exact same view on the 70 weeks as does Judaism.
But many of us who grew up in the JW world and left religion entirely are quite unaware of these changes. They didn't happen in Watchtower-land, and we weren't taught exactly about what was really happening in the real world of theology. Rejecting religion often means not keeping up on what really changed.
So we sometimes leave the JWs thinking that all Christians believe in Bible prophecy regarding the earth. Some still do, like the other cults that keep predicting a date for the end of the world. Like Marie Antoinette of whom legends says was unaware that people who had no bread to feed their children would at least surely have cake to give them, ex-JWs are sometimes products of being just as closed off from the real world of religion. Some of the reasons we might become atheist may not even be a thing in any other religion, but coming from a closed off society we can sometimes be like Marie Antoinette.
One friend wrote me that if Bible prophecy isn't really a thing, then he can't be an atheist anymore because that is the main reason he rejected God. I told he could still be an atheist even though Bible prophecy is not a real thing outside of the Watchtower and a few Fundamentalists Christian movements. The fact that the Bible isn't anything like the Jehovah's Witnesses taught doesn't automatically mean God exists. It only means Bible prophecy also doesn't exist.
Thus moving to Mars or living anywhere in space cannot invalidate a concept that doesn't exist.