Even with the caveats about limited data and untangling causation and correlation, the statistics are striking: the first year of a scheme in Wales where the speed limit on urban roads was lowered to 20mph resulted in about 100 fewer people killed or seriously injured.
Shooting someone or throwing someone off a cliff is a deliberate act to hurt/kill someone else. No driver wants to kill someone. (Well, apart from these extremists that occasionally drive into German Christmas markets…)
People mindlessly walking into traffic, because that funny video on Instagram is more important than watching their surroundings, they are the problem.