Earlier quoted context omitted.
The teenager's ability to drive safely isn't just a mechanical ability of driving a car or of just being aware of the laws/rules. Safe driving comes from years of experience on being able to decide how long it will take to stop at certain speeds in certain conditions. Being able to recognize their car's brakes are a little soft and might not stop on a dime any more. Being able to recognize that the driver in front of…
Hearsay is that you have to drive more than 100 000 km in diverse conditions with the right mindset in order to become a fluent and experienced driver. With an average mileage, that will take most people around a decade after beginning to drive. Most people never seem to become fluent, experienced drivers, because they lack the practice, or the mindset, or both.
I'm in North Texas, so I have a personal rule that if the temps are forecasted to be below freezing with any form of precipitation, I do not leave the house. People make moronic decisions on how to drive in those conditions because it doesn't happen enough and as a collective, proper ability to drive is forgotten every single time.