I can understand some of the reasoning behind hospital staff not attending, such as ambulance staff being the ones properly trained to move injured people with the lowest possibility of causing further injury and/or complications. That said, I do find it a little disturbing that this person was on hospital grounds and no-one attended him. Even if it was just a registrar coming out to give him a once over to determining if it was actually an emergency or not. Certainly not a great look for a hospital to have a prone person in the carpark for a long period of time with a security guard having to redirect traffic. There's mention of it being a hot, sunny day but no mention of hospital staff attempting to provide shade or water - basic needs.
To take the thread on a slightly different tangent, based on the title, I think a lot of this is down to an increasing lack of empathy within society as people are becoming noticeably more and more focused on themselves. In other words narcissistic. There's a growing commentary on an apparent significant rise in societal narcissism. A couple of basic but informative articles on the subject can be found here and here.