Supporting character whitewashed in film adaptation of "Warm Bodies"

Last week, author Isaac Marion was also interviewed about his role in the film’s casting process:

“I was consulted in the early stages of the process, and may have helped narrow down the list a little. I’m not sure what would have happened if I seriously objected to any of their casting, but luckily, I didn’t. I love the cast. They paid more attention to the actor’s personalities than their physical appearances, and I think that was the right choice. Personality is what matters in a character, not superficial indicators like height or hairstyle or even skin color, and the personalities of the cast all fit beautifully.” –Warm Bodies author Isaac Marion

Would that “having the right personality for the character” was the only barrier for actors of color in the movie industry.