That doesn't seem like it follows though. Most people are driving the same car they were driving in 2019. It's not like the auto industry went and changed everyone's cars and repaved the roads or something. If this was some long term trend, then sure, easier to see how you could explain it with changes in headlights or ride height or some other factor of how cars are designed.
A dramatic increase in amount and severity of accidents after a major world-impacting event like the pandemic seems like exactly the sort of thing that would make sense to be some change in the way people drive. This isn't "Oh, the users just hate the new Slack design. What idiots." For 90+ percent of the US, nothing has changed about the cars or roads in the last 4 years any more than the 4 years before that, and yet the outcomes of driving have changed.
A dramatic increase in amount and severity of accidents after a major world-impacting event like the pandemic seems like exactly the sort of thing that would make sense to be some change in the way people drive. This isn't "Oh, the users just hate the new Slack design. What idiots." For 90+ percent of the US, nothing has changed about the cars or roads in the last 4 years any more than the 4 years before that, and yet the outcomes of driving have changed.