I say unless you're in the military, then it shouldn't matter. If it's not something that YOU personally have to deal with day in and day out, then it should be up to the troops. I further exclude this to currently deployed/fighting/active people.
The really high up people that are old, have positions and just look cool (Chiefs of Staff, etc), since they won't be around much longer, leave it to the people who WILL have to deal with it.
It's kind of like being a senior in high school and voting on what to change the mascot to NEXT year, when you will be gone. You don't have to deal with it or it won't be affecting you very long, if at all.