Okay...and it's been a few thousand years. Hell, have have even advanced enough to send an invitation out there (Voyager). Soooo...where are they?
Sending voyager into space to try to talk to another civilization was like trying to talk to a whale by throwing a rock into the sea.
Advance extraterrestrial lifeforms would not necessarily have to be here or travel here physically to communicate with a receptive mind especially if those intelligences are of another dimension or realm of intelligent life..If it is true that there are lifeforms that are incorporeal in nature as scripture reports then they would have access to and dominion over what is incorporeal in man, the mind, and would not be restricted in anyway by space or time or the laws that restrict humans by virtue of their physical nature which is a part of the material universe..
Aside from that If there are advanced intelligences capable of traveling across the universe then they were already well aware of life developing on earth long before a human being ever wondered what a fart was...
You ask where are they? Perhaps they can only be seen by their effects in the same way one can only see the wind by the effect it has on the leaves of the trees.
Perhaps it is no coincidence that certain people throughout history have advanced or benefitted the species with an idea. Perhaps the many people who attributed their inspiration to a dream or a muse were people influenced by a superior intelligence like Moses was influenced to introduce divine law which teaches people to distinguish between clean and unclean, right and wrong, true and false, and life and death.