As the number of planets increases, the probability of other intelligent species besides humans approaches one. There are an estimated 100 billion planets in the milky way alone, yet no evidence of intelligent life off of Earth. https://en.m.wikipedia.org/wiki/Fermi_paradox …
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So we're like the guy who bought one lottery ticket and then won the 250,000,000 jackpot and then we to the conclusion that winning the Powerball must be pretty common? Meanwhile, many more tickets are being sold and no one is winning. Could be!
With that said, with how much is going on in the universe, it's gotta be only a matter of time before we make contact with someone else. Europe seemed pretty farfetched to North Americans before Columbus I bet.