I personally think the risk of EOL training to pavements (or airport grass even) is they are so forgiving, if the aircraft is not straight with forward speed at touchdown. This is obviously a good thing for initial training. But it is common to see on Youtube considerable run on speeds for EOL landings as the norm, and what is taught.
If you can't do a zero speed touchdown auto, without cutting the tail off, or have never been trained to do so, then you will almost certainly roll it over on an unprepared surface for real, with bad results for survivability. Try running it onto a beach, or the water, or the forest. Helicopters are built to survive significant vertical impacts but not being rolled over, even at slow speed.
Training is only helpful if it can be put into successful practice if the time comes, and such safe forgiving landing environments are rarely available. Think about the most common environment you fly over day in day out and make sure you are trained to survive landing in that if need be.