Simple inexperience/inadequate training is a big part of younger car accidents.
Yesterday I turned out to a head-on collision. At the highway at the end of my street. A young P plate driver couldn't explain why she ended up on the wrong side of the road, colliding with a oncoming vehicle.
The other driver, more experienced, saw the situation unfolding, and moved as far as possible to the left, but she still managed to head-on him.
The road was wet. It might have been a little icy. When the girl's ute lost rear grip, she didn't know what to do.
1. She didn't think to drive slower when conditions dictate.
2. Didn't recognise loss of grip.
3. Didn't automatically steer into the skid.
Worse still, she still won't know what to do next time it happens.
Lack of training.
On another occasion in the past, I was present when a young P plater lost it on a wet corner, and rolled a little hatchback. She said it was the second time that had happened. On the same corner. In a different car. Then she blamed the car for it.
Ignorance! - due entirely to poor training. Training isn't the all encompassing problem, but it's a significant part of it and most importantly it is a clearly addressable safety issue.