Maybe we aren’t intelligent enough for them to want to communicate with us yet. It amazes me how scientists have developed all these amazing terms, measurements, hypotheses, and theorums, which are for the most part, ego stroking, and still can’t produce matter from nothing or answer many simple questions.
A FReeper turned me on to a fascinating little Harry Turtledove short story called “The Road Not Taken” that suggests an interesting alternative to why.
Well worth a read if you’ve got an hour.
I think its entirely possible that the universe teems with life but none of it is intelligent or doesn’t have the right kind of intelligence. Who knows, maybe there is vast intelligence without the physical attributes to build with.
As a species, we're on the downhill slide.
I have another hypothesis to toss out there:
Maybe when a species advances to a certain point, its advances lead to its destruction.