Do you have the right to be an atheist?

[Tonus]

I think it might be a question of how likely it is that any alien races would be superior, or that they have supernatural powers. Adding attributes beyond "they exist" requires some basis. If we can determine that there are galaxies that are much older than ours, and that there might have been stars and planets that had a substantial head-start, then there might be alien races out there that have evolved far beyond us. How superior they are would require us to consider some options: if they're just like us but with four arms and scaly skin they might just be able to whip our asses with half-effort.

Supernatural is a whole other kettle of fish. We haven't verified that such a thing is possible, so there's no reason to assume that it is true. If we're starting from square one with minimal information, then it's just as possible that any alien races out there are far beneath us, and would consider us to be the gods. In which case, we would be the proof that gods exist. And I'm okay with that, because I have a pretty high opinion of myself. But it might be a let-down for everyone else.