"Where is everybody"?

They're all right here on Earth. If there's anything else, then it's unknown.

If we measure ourselves relative to the size of the universe and the Planck length, we might find that we're actually bigger than we are small. If that's the case, then that would make extraterrestrial life intuitively a bit less likely.

In addition, the requirement for extraterrestrial life to be extraterrestrial seems completely arbitrary. If we had been born in a world where a multitude of intelligent species fly around in spaceships and trade baking recipes at the centre of the Milky Way, most likely we'd still be bitching that we're all alone and that the other galaxies are unreachable.

The idea of a pass-fail test for civilisations seems a bit clunky to me. It touches on the same philosophical problem as that of "witnessing one's own demise". If we're too dead to see it, does it really happen? The ability to observe the universe seems to be a fundamental property of its own existence. Schrödinger's cat probably gets really bored after a while.