In the original scenario, the (assumed) trained medical crew member ASSISTED the pilot and the outcome was a safe landing. Who would argue AGAINST having them trained, especially for emergencies? Part of the training should be to give information as requested, not just randomly shout out random frequencies and gauge readings. Training the medical crew to assist AS REQUESTED by the PIC has no downside that I can see.
That, was the point to the original post. Training the medical crew to assist as requested by the pilot, would be beneficial in my opinion and obviously the consensus agrees. No one needs additional responsibilities on a mission, but part of our job, is to adapt and overcome. At the end of the day, the mission truly is to get home safe.