But OK, if you want to play that game... what is an asteroid that survives to reach the ground and kill someone?
A historically unprecedented event?
This article describes the properties of asteroids vs. meteorites.
Collisions between asteroids in space create smaller asteroidal fragments and these fragments are the sources of most meteorites that have struck the Earth's surface.
So you wish to explain away all those reports of deaths as due solely 100% to meteorites rather than asteroids? I see...
LessWrong is not big on discussion of non-AI existential risks. But Neil deGrasse Tyson notes killer asteroids not just as a generic problem, but as a specific one, naming Apophis as an imminent hazard.
So treat this as your exercise for today: what are the numbers, what is the risk, what are the costs, what actions are appropriate? Assume your answers need to work in the context of a society that's responded to the notion of anthropogenic climate change with almost nothing but blue vs. green politics.