Here's my additional two cents on this fiasco. I'm retired from a similar agency and believe that as the previous poster said, they probably should have simply landed and carried the injured person to the aircraft. Here's what probably happened... After training togather and merging into a "team" the crew then seeks out opportunities to perform that particular skill. They seek the feeling of shared accomplisment that a good hoist rescue provides. I do admit that I have felt that "need" in my former working life. The decision as to how to proceed is one that should ALWAYS be driven by what is best for the victim, not the course of action that will provide the best ego boost to the team on the aircraft.
Obviously, I can only guess their motivation, however I feel that beyond receiving proper training, crews called upon to provide these kinds of service need to examine their motivation before engaging in any course of operation.