Such a silly term is diversity in the first place. It implies that there is some inherent goodness in achieving diversity. Who says there is? Where is the demonstrative proof?
I was going to say diversity in
what way? Someone raised in California may be quite a different creature from someone raised in New York City whereas someone a "different" color may not be "diverse" at all, just have different colored skin.
I worked for a white woman in her wealthy home in the suburbs (complete with husband and 2 children) who was an expert on French West African poetry. She didn't strike me as "diverse" and I don't know that I'd find a French West African poet diverse either in the right subfield?
Presumably the faculty is larger and broader than a subfield and could have an influence on hiring the subfield so I'd do the faculty if I had to and let the subfield take care of itself.