Don’t know if you’ve served, but let me tell you, there are a lot of thankless jobs in the military. And while the jobs may be thankless, the folks that perform them are every bit as dedicated and mission critical as the task of the guy pulling a trigger with the enemy in his sights.
I’m not even sure Pentagon janitors are in the miilitary. And no, not every military job is “mission critical,” let alone as critical as the men in the field. The military is so damn big; much of ot has nothing whatsoever to do with combat, and the staff might as well be in the Department of Education. Armies have their Big Government, pencil pushing make-work, too.
Certainly not everyone is equally dedicated. Pretending they are is an insult to the ones who actually are dedicated. Even among janitors there are more and less dedicated workers.