Either they too just don't have means for communication on an astronomical scale or maybe nobody wants to have anything to do with these strange ape-like bipeda

Either they too just don't have means for communication on an astronomical scale or maybe nobody wants to have anything to do with these strange ape-like bipedal primitives and humanity is on an intergalactic ban list which prohibits any contact. With exception of those that get abducted from time to time to undergo alien experiments of course.