What you say is true. However, that is not what you go to Sandhurst for. That is not what his specialist training was for. That is not what his troop is for. Whichever way you look at it, Harry is now in an invidious position.
Yes, he can become the Poster Boy for polishing the seat of his pants behind a desk. All safe and secure, unlike his peers and his unit. I don't think there is any way situation can be called a win.
Unless something drastic happens in the very near future I think we will see a lot more of Harry playing polo and partying up large, followed by a resignation after a decent amount of time has passed. What else has he got. They haven't even left him with any self respect. "OK, we all knew from the start that this was a dangerous job, but if that's what you want, well here is you entrance to Sandhurst".
I cannot believe the MoD is that incompetent. They sent someone to Iraq to find out if it was too dangerous? War is dangerous. Even a child could have told them that, without the trip to Iraq.
That the Chiefs of Staff at the MoD are that indecisive, and have vacillated and procrastinated over just this one extremely sensitive issue, makes me wonder at their competence and therefore the safety of all military personnel in harms way.