You also have to understand how airbags work. They don't just go off in any collision. The collision needs to be in the designed parameters for the airbag to go off. That picture that started all this, there is no sign of a frontal impact that would set off the airbags. That truck is also old enough that side and rollover airbags didn't exist.
And yes, you can crunch up a car pretty good and not set them off. So she wasn't hurt, the wreck wasn't violent enough to justify setting them off. Not every frontal crash justifys setting off airbags.
Just because you don't understand how they work doesn't mean they are not working correctly.
As for the not swerve, that didn't work that well this morning. Nice fatality where a car plowed into the back of a truck at speed. There was plenty of open desert to run off the side of the road. Highway south of metro Phoenix closed for hours after fatal wreck - KTAR.com
When I was on the Mt. Hood Ski Patrol, I was working one day at Timberline. This woman came into the first aid room with a bloody chin. She apparently had driven into a snowbank and set off her airbag. No idea how fast and if/how bad the damage was to the front of her car. This was in the late 90s.