It's a combination of things. For instance drivers are statistically more likely to have accidents at 18 than 50. Drivers are more likely to have an expensive

It's a combination of things. For instance drivers are statistically more likely to have accidents at 18 than 50. Drivers are more likely to have an expensive car than 50 than 18. Being less financially secure often means you are trying to keep an old junker with crappy brakes going when young. Also risky behavior like speeding, DUI, driving aggressively, passing when unsafe, etc are generally more common when young. Sure individuals vary, but just look at the cost of insurance to verify.