I think, assume. With the Military, with the goal of killing people, that there is assumption of more human judgment being involved. Beyond even the issue of a man-in-the-loop for targeting systems. But even generally, that these are big decisions that shouldn't be farmed out completely.
There are 3 million people working in the US military.
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.
For every job in the private sector, there's probably someone in the DoD doing the same thing. In 2005, the tooth-to-tail ratio (combat to non-combat roles) was 1:8.1.
I'm guessing the vast majority of the AI usage is for things any typical office worker would use it for.