Atheism is unreasonable

[Mister Agenda]

Sure. But how many of them does abiogenesis occur on? What percentage of those result in civilizations. There could be a civilization per galaxy (100 billion civilizations) and we are far from the point of being able to detect a civilization in another galaxy that isn't a Type III civilization on the Kardashev scale.

100 billion civilizations and none of them reached Type III?

Maybe a bunch did. That doesn't mean they have FTL travel or are close enough to detect. How do you detect a Type III civilization from a dozen galaxies away? If anything, being Type III would make them harder to detect. A Type III civilization would make its galaxy dark.

Maybe no civillization is old enough to have achieved Type III. Maybe no civilization is inclined to reach it. Maybe Type III isn't possible.

There are plenty of reasons for us to not have detected another civilization...you just haven't put much thought into them.

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Sentient life on other planets could have started billions of years ago.

Could have does not equal did. We could be the eldest technologically advanced species in the universe for all we know.

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entire civilizations could have risen and fallen to dust by the time we gained the ability to even realize the planet is there.

All of them?

Maybe. It's unknowable. This is a case where it shouldn't be that hard for you to admit that you can't know why we haven't found another planet with life on it.