Over a million people around the world die because of cars every year. The most recent number I found for Canada was 1,998 people.
Let's compare that to knives. The most recent number I found for Canada was 138 people stabbed to death. Globally, 97k. Orders of magnitude in difference.
Most vehicle deaths are accidents, but you can't ignore the fact that cars kill far more people than knives.
I don't like cars, and one of the reasons is because they're extremely deadly and driving is basically the most dangerous thing we do on a regular basis.
This is exactly like when gun lovers try to say "this isn't the time to discuss gun laws" and "they would have found a way to hurt people regardless". Zero difference.
But actually this is exactly when we should argue about the existence of cars: someone just performed a live demonstration of how dangerous they are in the hands of someone who wants to kill people. Without a car, mass killing would be much much harder and it would also be possible for people to defend themselves or escape the danger. Cars also enable impulse killings in a way knives don't, because carrying a knife has to be premeditated whereas with a car the murder weapon is always readily available.