"Ah yes those outdated snapshots where we still see, on a regular basis, casualties spending far longer on the ground than they need to whilst the valuable AA asset is shut down beside them"
So now you're a HEMS specialist too, Crab? Just a wild guess on my part but I would imagine that the doctors / paramedics are probably better qualified than your good self to decide when a patient is ready to be moved. It doesn't matter what interventions the doctor or paramedic makes on scene, the aim is simple - stabilise the patient enough to get them to hospital. That may be five minutes or 45 minutes. It takes what it takes.
HEMS isn't about moving the patient ASAP, it's about getting resources on the scene quickly - and that may only be more powerful painkillers than the landcrews have - and then using those resources in whatever way best serves the patient.
As for the valuable asset being shut down on scene, you'd be better focusing on the turn-round times at hospitals where I can often spend an hour waiting for the paras to deliver the patient, get the kit back and try and thumb a lift back to the HLS if we've landed at a secondary site. A lot of time to lose during these short daylight winter days.
FF