Perhaps our idea of intelligent life doesn’t seem intelligent to other intelligent beings. When you consider the state of our world with it’s senseless wars, mass murders by governments, governments pillaging’s of it own citizens and other horrors. Truly intelligent beings would not trust us nor would want anything to do with us other than to keep an eye on us to keep us at arms distance.
I agree. Us trying to contact them with our primitive methods would be like Grunting at them caveman style. Why would they even make an attempt to reply back?