Interesting point, afterall a bugbear of mine is the way we place all armed forces personnel on some kind of pedestal. Not trying to diminish the contribution they do make but part of national psyche does seem to be if you served therefore you're beyond reproach as a human being.
So yes there's an arguement should you qualify because you just did your job. However there's another element to that where he did serve our countries interests (I use defend very lightly in regard to modern wars, not soldier fault) and was willing to put himself in a situation where could conceivably be killed for it. That has to qualify him in some regard to represent Britain in other ways surely? Police, Fire Brigade and the Ambulance Service contiinually put themselves into dangerous (and yes sometimes life threatening situations).
However then it starts shifting, do we extend that to the intelligence agencies SS, SIS, GCHQ etc.? Just field agents or desk people? Okay we've added the civil service in then does that includes everyoneeven those working at the job center? What about manufacturers of equipment HMGCC? Private companies that build this stuff?
Okay I'm running at the mouth here a little but it is a can of worms once you start saying it's enough to qualify you. However I think it does even if it is sentimental just that possibly others deserve it to.