I don't actually believe the following statement, but just to play devil's advocate, what would you say if I made the argument which is a direct corollary to the argument you are making:

"The head of diversity should be a white male because they are the only ones qualified to understand white male privilege and therefore will be more effective at working and communicating with others that also have the same privilege and coming up with ways to get others with privilege to change their behavior. Seeing that those with privilege are a majority in the industry, a white male leading it would be more effective leading more people to changing attitudes."