The military has a totally-****ed view of diversity, to the idiots who push it, it basically means "A bunch of people who look different all thinking exactly alike."
Nobody loves groupthink more than DOD leadership, and the one kind of 'Diversity' that would actually make it better - diversity of THOUGHT - is exactly the kind they can't stand.
As usually happens with DOD, they've taken something that actually has a kernel of sense to it, turned it sideways, 'Gone large,' and then rammed it up everyone's ass.