Because death by airplane crash is more exotic than death by car crash.
More like it is so rare AND so many people die that the news organizations play it over and over and Over and OVER and OVER!!!
Now imagine if those news organizations gave that same coverage to every single car crash (with a fatality).
The news would be nothing but car crashes.
And people would start to be terrified of driving anywhere.
Also TFA is incredibly stupid. His examples are meaningless in this context. An autonomous car SHOULD be able to stop itself and turn control over to a human when it encounters something it cannot handle.
And, over time, those cars WILL become more popular because the people who use them will pay lower insurance rates. That is because any accident they are in SHOULD be the fault of another driver OR the programming.
Look at the airports around Thanksgiving. They will be packed with people. Because people see the value in flying. Even when they give up control to someone else and it could result in an "exotic" death. The same with autonomous cars.