Why we have not been contacted by aliens

Maybe aliens aren’t physically equipped for interstellar contact. Astronomers estimate there are more than 2 trillion (2,000,000,000,000) galaxies in the observable universe, and these galaxies encompass more than 10,000,000,000,000,000,000,000,000 planets. That makes for vast real estate on which some forms of life could exist — and that’s not even counting the various moons upon which life also…