Colored Rain and Exotic Origin

In 2001 several districts in a southern state of India reported colored rain. Recently a scientist who was involved in the analysis of this rain water found that this rain had biological cells without any DNA. This led him to conclude that the cells do not belong to earth!

Apparently this is more evidence for a theory called panspermia. In short, this theory says that life originated elsewhere and was brought/delivered to earth. This suggests that origin of life is not native to earth!

Let us evaluate the major human contention that life originated on earth from a philosophical standpoint. Our planet is so small relative to the universe that it is much akin to a speck of dust on earth. If we assume that this speck of dust moves around and interacts with other dust particles and figures out that there are 20 different elements and compounds. Suppose this speck claims that this is an exhaustive list of elements and the chance (based on the evidence it has collected) that there are other elements and compounds is nearly zero. It is not hard to see the absurdity of this claim even if we assumed that we do not know the periodic table and all compounds. This is because the interaction of this dust particle is simply not sufficient to make a conclusion about an object that is much much bigger than itself. The human claim that life has originated on earth can be thought of as analogous to the specks claim. How much of the universe have we explored? Don't you think its preposterous to hold on to the view that earth is the only planet in this whole wide universe that is blessed with conditions that are conducive for life?