RVDT,
You make some good observations, but I'm not sure I entirely agree with all of them. For instance - should the crew be aware of the casualties condition or make decisions based on their injuries?
Certainly once they're on board; countless times we have had to make the decision to go either high/low based on condition, or fast or slow based on the effect of vibration on a casualty.
The general consensus in the area is that they are taxed with rescuing "idiots" that shouldn't have been there in the first place proving you cannot legislate for stupidity.
The general public do regularly do daft things - I think we all agree on that; but they are also taxed with paying for the service.