I think there is another factor that not everyone considers, which is time.
Think about it: mankind has got some sort of "advanced" tecnology like artificial light for only a couple of hundred years, while the universe exists for fore than ten billions of years. What are the odds of another lifeform to be in a somewhat similar state of tecnological evolution? Wouldn't it be far more likely they'd be "beyond" of us, or "ahead" (whatever that might be), for that matter.
Now I don't know if I have made myself understood (not likely), but I'm tired as hell.