The issue isn't the 30k people dying in one set of crashes. It is the systemic issue caused if all of our transportation and shipping capacity went offline at the same time as all ICE refuel capacity in a nation was taken offline at the same time.
If that happens, car crashes aren't the problem - it's the widespread famine that follows in a week's time.
It's not even the tinfoil-hat issue, it's standard emergency issues. Think of the damage a hurricane does to wide swaths of coastal land. Think of being trapped in Napa last fall during the firestorms. Think of a bad blizzard or a lucky lightning bolt to the right transformer. At least once a year, I think there is a sizable portion of the US population, let alone world population, that needs unconnected emergency ready transport in under 2 days notice. Expecting people to pay $30k+ for a car and not have that baked-in is a no-go.
This is why I think it's crazy that AT&T is trying to take down all their copper POTS lines which have traditionally been seen as an important asset in a regional emergency.
If that happens, car crashes aren't the problem - it's the widespread famine that follows in a week's time.