I do not think that any airbags inflating under the helicopter will take off, as it were. The examples you show are of them not in full control. Flotation bags offshore expect the helicopter to be ditched correctly under full control otherwise it will not stay upright; the same would be expected on the ground.
Personally I would like to see full OEI performance at all weights and temperature altitudes. Should standard airline passengers be told that they was being bumped because it was too hot and there was not enough wind down the runway there would be an uproar and so it should be with passenger carrying helicopters.