I have to agree with What Limits on this. After all, HEMS and Casevac to Hospitals are a form of public transport, and helicopter landings at certain hospital sites, especially those which are able to provide special care to patients, are rather predictable in the sense that everybody knows they will take place.
So why not demand the same level of safety (for crews, patients and passers-by) as for instance in offshore flying, where flights take place to remote helidecks?
I do agree that funding for this should be provided, and I am aware of the problems there. But to accept unnecessary risks and put the burden on the crews by putting them in a "damned if you do, damned if you don't" scenario, should be out of the question.
Remember the Aussie SAR accident discussion about providing the profesionals at the sharp end with the right tools for the job?