Why haven't we made contact with alien civilisations yet then? It's a question I ask myself on a daily basis... then I tell myself to shut up because they're not real. Rational? In denial? Hey, we can only go on the evidence on front of us.
But we may finally have stumbled across the truth. Aliens are real - in fact, they're so real that they've managed to fool us all along by intentionally hiding themselves and watching over humankind, as if they're keeping us in some sort of 'galactic zoo'. WHY DIDN'T WE REALISE THIS SOONER? It seems so plausible.