I agree about the limited use, and possible dangers, of a "self-service" rescue hoist.
Many survivors, as was the case in this instance, are unable to fit the rescue strop themselves.
This chap was unconscious.
Even when the survivor is conscious, in cold conditions the first thing to go is the use of the hands, second thing to cease functioning properly is the brain.
Even a simple strop may not be fitted properly, or at all, if a crew member isn't there to supervise.