There's no argument that both ends of the age spectrum show statistics that indicate an increased level of crashes by both groups.
In the young people, the reasons are impulsiveness, risk-taking, lack of experience, and inadequate control skills (related to the foregoing).
In older drivers, the reasons are age-related cognitive decline, slower reflexes, age-related health conditions, and (the very worst part) - a substantial long-term decline in driving skills, caused by bad driving habits that are not addressed. Things such as driving through stop signs on a regular basis, rather than stopping, and looking as required.
Failure to keep up a consistent level of alertness, as in looking for vehicles, in a regular pattern, when pulling out into conflicting traffic.
How many of you have had an aged driver pull out directly in front of you, without looking, or with a casual glance that does not register your vehicle is there? I get it regularly, but I make allowance for older drivers.
Then I get someone in their 40's or 50's who does the exact same thing! - showing a decline in driving skills and habits, that is already creeping in, and not being addressed.
I nearly cleaned up a medical professional in his 50's in his big new Mercedes on Thursday, when he pulled out straight in front of me, without even a glance in my direction!
He made things even worse by pulling into my lane, without indicating or looking (because the kerbside lane was full of parked cars) - leaving me nowhere to go, but up onto the centre median strip under extremely heavy braking!
Yes, I should've been going slower, and allowing for him doing something stupid - but he sprang straight out of the side street, on my left, from in front of a truck turning left, so I couldn't see him until it was far too late.
This decline in keeping up strict driving habits starts after about 15 or 20 years of driving, and continues to get worse, unless it's addressed with corrective instruction, and effort on the part of the driver.
We've all seen how taxi-drivers skills decline through bad habits, and long years behind the wheel, and you don't have to have aged taxi drivers, to encounter it.