Just a few possible explanations.

https://worldmetrics.org/car-accident-age-statistics/

Older adults (65+) are the fastest-growing driver population, with a crash rate 7x higher than 35-54 year olds per mile driven

Older drivers are 2x more likely to be involved in a crash due to pedestrian collisions

Drivers aged 65+ make up 12% of drivers but 20% of pedestrian fatalities