It seems much likelier that we are alone in the galaxy. Either civilizations are pretty rare or we are the oldest one. If the latter is true this seems anthropic evidence in favour of the simulation hypothesis.
Or it could be anthropic evidence that the first mover advantage is so large that the first civilization to expand prevents all others from even developing.
Or it could be anthropic evidence that the first mover advantage is so large that the first civilization to expand prevents all others from even developing.