Airbags cant save you if the cage or the cabin as its called crumbles in an accident. Airbags alone is just a gimmick if a car cant sustain accidents. Suzukis are cheap, small cars and crash worthiness is not an issue for manufacturer.
Take a look at crash rating for a MINI. Its a small car but has 5 star rating.
http://www.iihs.org/iihs/ratings/vehicle/v/mini/cooper-2-door-hatchback/2017
In the pictures as you can see, the frame of the cabin does not crumble. This is a demonstration of high level technology that BMW uses even in a small car.