Why would we want to hear from creatures from outer space? A lot of effort is being put into radio receivers, telescopic equipment, space exploration and so on.
Uncommon phenomena like the green flash, or even stranger than fiction flying objects captured on flight cams in the past and ufo 'sightings' are a source of fascination and curiosity for many.
For the religious, understanding the universe is a source of appreciation for the creator's genius and sovereignty.
If there is life out there, and we find it, what next?