My DS currently happens to have a 3.99 GPA at USAFA and is white. He mimicked your sons athleticism and HS leadership roles. Are you suggesting that men and women won't follow him into conflict (or follow others more)? Every student adds a level of diversity. Heck he is agnostic and isn't politically conservative. So for USAFA, he too is "diverse" and isn't a cookie cutter cadet. So as others have said, diversity comes in many flavors.
Heck, we visited Stanford before he decided on USAFA. That was a genuinely diverse crowd as well. Most campus are. Well.. Maybe not Duke.
I suspect those at the helm have a better handle on this topic than me. So please don't take my opinion as right. More than anything, I enjoy peoples perspective on this interesting topic.
That said, when other people (including the AF) don't spend their
own money, then waste occurs and poor economic decisions are made. It's a universal law. So it is good for taxpayers to question how money is spent.
Getting back to your son, if an ACT score was the sole predictor of brain power and success as a leader at USAFA, my DS may not have gotten in. In fact, he didn't make it in until the last minute. Your son got in because they predicted a successful cadet.