Everyone is starting to use AI. I use three AIs daily. Why would the US military be different?
I presume they might view their internal data being used to train a private company's training sets as a concern.
Very few of them ever come close to killing anyone.
Mostly they're white collar workers doing regular desk jobs, where AI is just as useful as in other industries.
I'm guessing the vast majority of the AI usage is for things any typical office worker would use it for.