Most drivers over estimate their own ability. And some will assume because they have not needed some 'new fangled' safety device in the past they wont need it in the future.
There are still fools who drive without wearing a seat belt, and some would buy a new car without seat belts if it were cheaper and legal. They may try to justify it by claiming they dont want to be trapped in a burning car ,or some such nonsense. - they'd rather be unable to move due to massive internal injuries
You will never be as good a driver as you think you are. And however good a driver you become you will never stop making some mistakes. Better drivers are more likely to realise when they make a mistake ,such as not spotting a hazard as early as they know they should have, and will learn from it. But even they will be blissfully unaware of some of their mistakes, and some drivers are blissfully unaware of most of their many mistakes and assume they are great drivers.
Each new safety device put in a car caused negative comments...
ABS - I can brake as well as a computer. Never had crashes, I'm careful.
Airbag - I can hold the steering wheel with my arms and muscles
ESP - I can control my car better than a computer, I drive carefully
AutoLights and autowipers- I want to control all parts of my car, even dipped beams.
Led Headlights - I don'n need so much light
Autonomous braking - see Autolights and I drive carefully.
....