Not when you are rescuing people from the sides of mountains - they may not be winching but the risks are still the same. The main difference would seem to be that there would be another way off the mountain for the casualty with the HEMS setup ie by skidoo or similar.
The point is that you can have go/no-go weather limits which allow you to launch quite legally but are subject to rapid change in the mountains - very possibly while you are on the ground loading the casualty. Your options are limited if the LS isn't suitable for shutdown so trying to get out and rolling the aircraft over is very unfortunate but not something you can just blame on poor training or currency.