A careful reading of the Scriptures does not support this. The idea that deafness should be overcome by healing, by becoming hearing, or assimilation, by being accepted as functioning as hearing, is based on a false assumption. To say that people need healing, or are only acceptable if they function like the majority, is to imply that they are deficient, lacking in something, falling short of the norm or some state of perfection. We are all complete persons in some way, and we are all incomplete persons in some way too. Healing is about wholeness - not just the physical body, not just about disabilities, illnesses, mental disorders.
Healing is for the whole person.
The idea that disabled people are incomplete or less than whole arises in part from misunderstandings about God, and about our bodies. God is perfect. We are created in God's image. This assumes that the perfect body is God's image. When we think of God's image we think more in terms of his character, nature and attributes.