He has a point there. A lot of our experience at work can be quite highly therapeutic. We're busy and occupied the whole day, our friends and other silly people are within a quick SMS away for a little break and general entertainment to break up the monotony of the day, and really the atmosphere is a lot more livening than an isolation ward at home. So I fully understand his reluctance to stay off campus, even though I and many other colleagues berated him fully for not taking care of himself by going home to recuperate from his rather serious injury.
The end of the matter came when he was banned from darkening our doors again by the P himself, so there's nothing more to be said about that.
Poor Josh. Take care of that elbow, keep it immobilized, rest well and recover soon!