How does the story of Christy Brown’s life and how he dealt with his cerebral palsy illustrate Baynton’s points about disability and the language of disability?

How does the story of Christy Brown’s life and how he dealt with his cerebral palsy illustrate Baynton’s points about disability and the language of disability? The film reviews all laud Brown’s “courage” and “determination” in dealing with his disability, yet he was also hard drinking and fairly clear-eyed in his approach to life. How is our society’s penchant for defining disability as “lack” borne out in these reviews? How does this film challenge or uphold our definitions of disability?