The safety lesson is to focus training on how to avoid an approach to the stall particularly in the descent and approach phases of flight, and not low altitude stall recovery
PEI. That is certainly one point of view, although it has one small problem.
It is akin to saying I will not teach you how to swim because that is too dangerous. Instead I will teach you how not to go near the water.
Or put another way. I will not teach you how to defend yourself against a bad guy but will teach you which pubs to avoid.. Get the drift?