It's not going to work out for completely non-spiritual atheism either. Once there are aliens, then there are other dimensions, then possibly we find out we exist in multiple realities and this is a simplification of that that we temporarily agree to so that we can experience time and less of reality at once. Aliens, the thousands if not millions of species, including Homo Sapien aliens, once confirmed to exist will literally undo everyone's belief systems dramatically sand one would be recognized as delusional for not accepting it. I think this is well known and truth or disinfo campaign notwithstanding you can weild a lot of power if people are under those assumptions