I think for the most part the motivation lies in that the parents/professionals want the child to be more "normal" (as in more like hearing people). I don't think having oral skills enable the person to have more of an advantage than a person who is has no oral skills. A deaf person, regardless of communication modality, will face discrimination and will need to find ways (soemtimes have to be creative) for the workplace to make accommodations.
In my personal experiences - the modality of the child's communcation isn't the issue. If the child grows up in an environment that is nurturing and supportive, that child will learn means of self-advocacy. By that I mean the deaf adult will say, "I am deaf. This is how I communicate. This is what we can do to make sure equal and clear communication happens so I can be the best employee for you."
