Hunger drives us to eat... to be satisfied, to be filled. Too much hunger drives us to eat anything... to be satisfied, to be filled. Yet to be filled and satisfied with just anything is dangerous. *Therein lies the beauty and the problem of hunger... Without it you don't eat. Too much of it and you'll eat anything. A man starving will attempt to be satisfied with "food" that he wouldn't normally consider; grass, grubs, bark, etc... (I haven't tried this myself but I have watched several episodes of Man vs Wild.)
Our society has a spiritual hunger. Which is good because it drives people to connect and yet many are spiritually starving. And a society spiritually starving will consider "food" they wouldn't normally consider; sexual perversion, materialism, rampant voyeurism, humanistic religions, etc..
Hunger is good and bad.
But our issues go deeper. Because we don't want to admit we're starving. You would never find a man starving for food who would try and deny it. Presented with any kind of food he would, without apology eat it. But in the face of spiritual starvation we react differently. We turn away, deny, mask and hide. These two issues, starvation and denial, deeply frustrate our attempts at finding sustenance.
*N.T. Wright writes about some of this in "Simply Christian".