I think you've missed the point. The side came off a plane, and we've learned that it was because Boeing and the airlines cheaped out on the bolts, the labor, and the maintenance, and then dodged safety regulations.

Yes, cars are also dangerous. Driving is statistically more dangerous than flying, but if a car manufacturer knowingly dodges safety regulations, that's the end of that car. The difference is that, while everyone remembers the Pinto for the explosions, but nobody thinks of it when they buy an F150.

Boeing can't do that with a new model of plane. They have to keep promising that they aren't skipping bolts anymore, and that the side of the plane won't fall off again. It's going to take a long time to earn back that trust.