Ursula Le Guin's "The Ones Who Walk Away From The Omelas"

The people of the Omelas are described as happy, and the life they live is anything but simple, although it may appear like that to the reader (I agree that it is simple).  I think it is so strange that the entire Omelas' community is aware of the young, helpless boy that is being deprived and held captive.  To me, doing something like this in a "world of happniess" just doesn't make any sense.  In the story I underlined how Le Guin mentions that for the Omelas, guilt does not exist.  "One thing I know there is none of in the Omelas is guilt."  Obviously, this shows the Omelas are lacking human characteristics, and are clearly not thinking about how they are hurting the helpless boy being held captive.