Yes, we all know that - and that's why there is a dilemma. However, it is in the very nature of many of emergency services that members of the service inevitably often have to put their own life/limb at risk in order to save others, so they have to make a professional judgement (about 'calculated risks') before they do anything. Some situations will inevitably be 'hopeless' (i.e. the risks involved are just not worth taking) but it would be pretty/very rare to hear of cases when, say lifeboat crews, mountain rescue teams or whoever had decided to 'do nothing' because the risk to themselves was too great.But consider this : if you are dead or seriously hurt then you cannot help the original victim; and you've just added another victim to the incident for others to deal with (ie made things worse).
Sure. I've fortunately never been faced with having to deal with a situation like that on my own, so it's hard to know how I would react - but probably similarly to you. However, you and I are both 'amateurs' in this regard, and that's very different from professionals who are employed and trained to take calculated risks.If I came across a situation as described then I'd probably want to help. What I'd do would have so many variables it's hard to say - but if for example I happened to be in the Land Rover, and it was dry, then I might be tempted to reverse up to it with the back door open, drop a (dry) tow rope onto it from inside the LR, and pull it free. If it's raining then I'd think a bit more before doing that but might still do it.
Kind Regards, John