I could be wrong, but I'm not sure where you get the idea that the child would have to go to an oral deaf school. Even though with all the crazy CI legislation and ideas about who should get it and how they should handle it, who knows if that's actually supported somewhere. FJ and others are examples of people with children who do not go to an oral deaf school. If I'm correct, I think Li Li goes to a bi-bi school.
I don't think hard work for the child necessarily implies you want them to be a poster child. I know of one person with an implant who was taught to sign and to speak. They went through speech therapy to improve their speech as a child, and then stopped when my friend said he felt good about it. His speech still isn't "perfect," but he's happy, and that's what counts. He isn't a poster child by any means, but they dedicated time to him so that he could have access to both spoken communication and to ASL.
I know the subject of my friend has been touchy to some deafies, since he was implanted at 3, but there's nothing we can do to change it, and he has told me he does not want it removed (he is now 21). He likes the way things are for him.
If you did not commit to your child, it would seem like the parent viewed an implant as a cure-all where they just put it on and POOF! It's all solved. Commitment is required to help your child adjust to the implant and to help them identify sounds, etc. I don't know as much about the process as others do, but I know if you just had the surgery and had little commitment to your child, it's just the same as if your child was hearing and you figured they would be fine without your commitment to interacting with them.
Edit: if you did not make a commitment to helping your child adjust to the CI, as far as the psychology of getting a CI goes with parents, you might not be allowed to get one--because once again, it seems neglectful to not help the child adapt. Whether through ASL and speech therapy, or whatever method is chosen. But something must be chosen. I won't go into what I think SHOULD be done, but I'm saying I think that is the reason why they have to make some sort of pledge to help the child adapt.