Except that, as you well know, in a majority of rescues in the UK, there already is someone on the ground with the casualty - MRT, ambulance paramedic, first responder, coastguard etc etc so you already know from talking to those on airwave/ch 0 on scene what you are facing.
You often get launched with scant information but this is usually quickly updated en route and the main reason you have been tasked is because a winch-equipped helicopter is the best way of extracting the casualty quickly and getting them to primary medical care.
On the occasions when you are first on scene then winching is often the most expeditious way to get the winchman/paramedic to the casualty in order to make an assessment on the injuries and urgency.