For most job positions at most companies, there is a surplus of over-qualified people that could be hired to do the job. Forget the 'awesome work' bit. Ludicrous adjectives belong in Apple's marketing (though HR probably feels they can pepper the walls inside the company with them to boost productivity.) Since there is a large population of qualified applicants to pick from, it should be easy to skew things as needed to fulfill 'diversity' requirements.
Apple can take advantage of the PR opportunity. Cook recognizes that, and probably hopes it can serve as cover for the ongoing, continuing, lackluster product road map. Apple makes cellphones and niche computers. They also sell music (sugar water) to kids.
If they can become 'The Diverse' company it will help them remain prominent for a bit longer than otherwise would be the case. Possibly long enough for the stock value to stay up for some planned time span.