To reason usefully one must consider all aspects of an issue.

Burch's Law is a special case of a more general rule: Just because your ethics require an action doesn't mean the universe will exempt you from the consequences. If the universe were fair, like a sympathetic human, the universe would understand that you had overriding ethical reasons for your action, and would exempt you from the usual penalties. The judge would rule "justifiable homicide" instead of "murder" and exempt you from the usual prison term. Well, the universe isn't fair and it won't exempt you from the consequences. We know the equations of physics in enough detail to know that the equations don't contain any quantities reflective of ethical considerations.

We don't send automobile manufacturers to jail, even though manufactured cars kill an estimated 1.2 million people per year worldwide. (One Holocaust per decade, or around 2% of the annual planetary death rate.) Not everyone who dies in an automobile accident is someone who decided to drive a car. The tally of casualties includes pedestrians. It includes minor children who had to be pushed screaming into the car on the way to school. And yet we still manufacture automobiles, because, well, we're in a hurry. I don't even disagree with this decision. I drive a car myself. The point is that the consequences don't change no matter how good the ethical justification sounds. The people who die in automobile accidents are still dead. We can suspend the jail penalty, but we can't suspend the laws of physics.

Humanity hasn't had much luck suspending the laws of economics, either. If people have a right to be stupid, the market will respond by supplying all the stupidity that can be sold.

What would be the death toll if cars were banned? People have always died travelling. Riding horses or being carried in wagons, even those pulled by oxen, caused fatalities. Plus, much less travel would happen, since speed and range would be reduced, so much else would change, often in ways that increased mortality. We can all provide other examples of death from such a ban.

It seems to me that banning cars would be stupid. I suspect that most cases of "stupidity" are less stupid than the proposed cures. Perhaps we should ban bans? Wait . . . Never mind.