The atmosphere may well be more 'convivial' and splendid for 'the poor blighters' recovering.
However, a single hospital would not serve the needs of most, being geographically remote from most of those needing to use it. No matter where it could be sited, a single source for treatment would be far too far from most to be useful.
We need dispersed capability so the follow up needs of those injured are closer to travel to and from. I'm not saying the current system works in any way, and does need further investment. We can't divorce the mil medical needs from the rest of the NHS - there would never be the resources and the continuity wouldn't be there.
I've seen the trouble it created to get lads to Haslar from Lincolnshire just for a single appointment with a specialist. The troubles to go through even getting families to Selly Oak to see patients and be with them is bad enough just from here!
We have gone too far away from Service Hospitals and a single establishment is not the answer. partly for the points above. My view is that of need and practicality and has nothing to do with rank, status or any other bizarre perceptions some people here have.