It seems disingenuous to dismiss this offhand as a reasonable proxy for incidents. It would be strange for there to be no correlation between fatal risk of injury, and chance of any injury, or 'incidents'.
https://www.mvmlaw.com/blog/do-car-accidents-happen-more-in-... has multiple links supporting this
Intuitively one might say that high velocity crashes could involve more fatalities, but an easy counter to that is that pedestrian deaths would represent more in urban areas.