It is illogical to assume life exists only on this planet.
Say's who ? you let me know when life is discovered on another planet. That is kind of the approach of Darwin by assuming that the fossil record would show a slow gradual evolution of organisms and his theory failed. Some are just not willing to admit it though and continue with the charade.
So assuming we find life somewhere else, what's your position then?
It's possible we'll move on toward a more sane appreciation of religion at that point.
No LIKELY. But possible.