probably a combination of the fact that there are substantially more trucks in the US compared to places in the EU for example where the statistics are probably significantly closer to "margin of error" levels of accuracy.

The US also has substantially more people driving, substantially more road, substantially less skilled drivers one could argue, though i would argue we have a much wider range of skilled drivers, than somewhere like germany for example, where they have a might tighter though higher sitting range of skilled drivers.

edit: a lot of these trucks outside the US are likely to be work vehicles exclusively i imagine, where as in the US they're primarily work and personal, though i sure do see a lot more personal trucks on the road than i do work trucks on the road.

In short, other places don't have these issues because other places simply have a lot less vehicles, and a lot less traffic, as well as a lot less of these trucks per capita compared to the US which is just statistically what you expect to see in the results.

Dangerous vehicles are really only dangerous when in large numbers because otherwise they are quite literally a statistical anomaly. It's why old vehicles are still allowed on the road in the US even though they're less safe, there just isn't enough of them for it to be statistically significant.