Some points I'd like to make.
1. The best way a deaf child can learn speech is by using ASL -
With speech training you need to hear your own voice to get that audio feedback with the help of a CI. I wouldn't say the best way to learn speech is through ASL but through auditory exercises.
2. Even with a CI, you're still deaf. -
Sure. Who says that they are hearing? Turn off the CI, they can't hear a thing. So...?
3. When being implanted with a CI, you actually lose ALL of the residueal hearing you had left. Which means if the CI fails in some fashion, you're chances of using advanced digital hearing aids is doomed.
That was the past, nowadays there are techniques that minimizes the damage from electrode insertion into the cochlea.
- Hearing Preservation with Cochlear Implants | MED-EL
They began studying and implementing these techniques since the middle 2000s.
http://www.metroatlantaotolaryngology.org/journal/may07/cochlear_signal.pdf
4. To merely suggest that a deaf person without a CI cannot enjoy life with sounds is insulting and idiotic. I'm profoundly deaf, but I'm a music junkie. I go to concerts, turn up music in my car, and yes, I follow along with the words. Deafness doesn't stop me at doing anything...if anything at all, it made me creative in finding ways to do things in life.
People have their preferences when it comes to listening to music.