*Because reality has a "liberal bias"
Jesus expelled demons, as recorded in the Gospels. In perhaps the most famous instance, he expelled a "legion" of demons from a man and permitted the demons to go into a herd of pigs (see Gaderene Swine). Jesus also cautioned some sufferers of demonic possession that if one demon was exorcised, seven more might want to "enter" the "clean house".
Demonic pigs? Sounds scary! Why not just banish the demons to the land of wind and ghosts?