Peter and Nita were obviously happy with and proud of their deafness. They loved living in deaf culture and they wanted their family to live in it too. One of the strongest points that Peter, Nita, and other members of the deaf society made is that deafness cannot always be considered a handicap. They were happy with who they were and they had fully functioning lives in the hearing world. They felt that hearing was not necessary for them. They also repeatedly made the point that parents should love their children however they are born, even if they are deaf. The parents should not make the child to get a cochlear implant until he or she is old enough to make a comprehensive decision about it.
On the other hand, Chris and Mari, along with the other families who had children with cochlear implants, had many strong points as well. They believed that being able to hear would make the children's lives a lot easier, because the world does not typically cater to deaf people. It is much harder to find a good deaf school than a good hearing school, so deaf people sometimes do not get great educations. Another strong point that they made was that cochlear implants work the best when children are young. It is much easier for children to develop their language and speech than adults, who might never be able to fully learn how to speak. If a child waits too long to get the implant, it might be too late.
It is hard to say whether it is better to allow a deaf child to grow up deaf, or to give them an implant to make them hear. There are benefits and consequences of both. Many deaf people are proud of their deaf culture and they do not want it taken away from them, but the ability to hear will provide a person with many more opportunities in life. I'd say the best choice is to leave the decision up to the parents, who should be well educated on each stance, and up to the children who are born deaf.