Because CI is powerful tool than hearing aids which requires surgical procedure, Some Deafness cannot pick up sounds with hearing aids, so they want more, they go after CI, When they get implanted, They intend to hear better with their malfunctioning CI than they heard with hearing aids. They go like "OMG! I can hear! I'm hearing now! I can hear the cows mooing all the way from New York to Canada!" "I can hear my own dad snoring, OMG! It sounds like a horse!"
Don't take my post offensed, It only meant to be humor on the last part.