The death is fated. Whatever stability control that you think "might" have prevented the car from losing control. It might, it might not. But it is fated. You cannot turn back time to change fate.

The pajero has side airbags and deployed. So now the question is they fly out first or air bag deployed first?

Seatbelts don't need to snap for passengers to get flung out of their vehicles, esp when it involves a roll which all the windows will shatter on the first rotation allowing the passengers to be flung out. Our standard 3 point harness is made for head on collision but offers little protection in a roll. For that you need a 4 to 5 point harness used by racing cars that straps you tightly to the seats without any leeway. There are plenty of articles on the lack of safety in our standard 3 point harness in the event of a violent roll over.