Hm. When thinking about how pock marked earth is, I'm not so certain. Also space is dynamic. As I understand it, we only have a vague understanding of what happens in the https://en.wikipedia.org/wiki/Kuiper_belt , https://en.wikipedia.org/wiki/Hills_cloud & https://en.wikipedia.org/wiki/Oort_cloud and how the trajectories of objects therrin could be perturbed by https://en.wikipedia.org/wiki/Rogue_planet s and the movements of our nearest solar neighbours which probably have similar 'clouds' of objects around them.

And it wouldn't need to be as big as Dino-Ex, either.

Imagine what would happen if something like this impacted or air-bursted with the population density and fragile logistic dependencies of today:

https://phys.org/news/2008-03-cuneiform-clay-tablet.html

Also in that region, just a few thousand years earlier:

https://www.nature.com/articles/s41598-020-60867-w

Suspected as a possible cause for the onset of the Younger Dryas

https://en.wikipedia.org/wiki/Younger_Dryas_impact_hypothesi...

edit: https://en.wikipedia.org/wiki/List_of_possible_impact_struct...

Sort for age, look at diameter of crater in kilometers for the first dozen youngest and think about what that would do for any contemporary agglomeration.