Not all accidents are perfectly simulated head-on, offset or rear-end collisions either.
Not all accidents happen at as high speeds as the cars you've depicted in your photographs. Some people die in 20 mph collisions.
Sure you're less likely to survive a 120mph shunt than a 20 mph impact, but it's possible, and given the choice wouldn't you rather have the possible protection of an airbag, than not? 💡
This crash, as awful as it appeared was non-fatal. The driver walked away, got in the spare car and joined the restart of the race.
I'm not going to post a video of Ayrton Senna's fatal crash here, but the videos are out there. Look how innocuous it seems in relation to the crash above, but the consequences were far worse. Was it because of poor safety equipment or because of sheer bad luck? 4 or 5cm to the other side and few extra degrees of rotation on the rebounding wheel Senna gets a big black tyre mark on his helmet, a serious concussion but lives to tell the tale. As we well know that's not what happened, but that's not the fault of the safety equipment on his car.
By the same token,
take a look at this thread and the lucky bugger that got out of that wreck alive and unharmed, and then consider how many folks haven't survived nearly as serious an accident in the same car.
I can only assume from your response that you consider safety features such as safety belts a silly "option" too?
A colleague of mine, whose wedding I'm attending next weekend is going to be minus one guest there. His Father was killed last year as a result of refusing to take advantage of the safety equipment provided by his vehicle and was fatally ejected from the car during the accident, purely because he refused to buckle-up while driving.