Quite the contrary, my friend. It's just the mere gigantomatic Hugeness of the universe that makes an alien encounter "very" unlikely. See, the universe is about 14 billion years old. In this frame, the whole existence of the Homo Sapiens is nothing more than a blink and if the Doomsday Argument is somewhat correct, we will probably go extinct in about 800 years. Even with our radiation expanding at the speed of light, this timeframe is just too short for anybody outthere noticing us in time (even assuming they are pointing their ears in our direction and still have this ancient tech around to receive our "messages"). Please take note that I didn't say that we will not find alien life somewhere eventually. It depends on what you are looking for. Bacteria? Yes, definitely! Plants, algae? For sure. Low lifeforms like small animals? Well, maybe. But intelligent, civilised Beeings, who are neither way less nor far far far more advanced compared to us? I highly doubt that, sir. Think of it like Ants trying to communicate with humans... for us beeing the ants, of course. Aliens who happen to be in the perfect state of development in order to communicate with us, flying around in spaceships, not only in the LaniakeaSupercluster, but in our local galaxy group, trough the milkyway, right into our solar neighborhood? -there you got me, rolling my eyes.