Parents who implant early defend their decision by statistics showing how early implantation works best, and how early implantation success is is related to the natural way of human brain development.
That's not only the whole truth, I've seen some parents have stated in here many times about giving a child an opportunity to hear and the language communication based on what the family uses in the household.
These are the very same parents who's willing to turn a blind eye to the benefits of teaching nor continuing the use of sign language with their deaf child.
Having hearing is their first priority for their child, how many numeric of times I've heard repeatedly that they do not want their child to missed out the sounds of life in the world, that was very important to them.
Any child can success in the world.