The user(s) you might not want are the parents, not the disabled child. Proper care for the child represents their quite unique problem that they want you to so

The user(s) you might not want are the parents, not the disabled child. Proper care for the child represents their quite unique problem that they want you to solve so they can use your product. The child having special needs is what sets these patents/users apart from the parents/users you made the product for.