What’s interesting from this thread is the assumption that because boys particularly but all 17-24s are the biggest group in fatal crashes, and that many assume its maturity levels that’s the factor, so delaying learning to drive until 18 (or older) would fix that. It’s also lack of experience- the more you drive the safer you get. Pushing learning to drive until 18 wouldn’t fix that, only push back a year of experience and mean for many young people, have a year less of practice driving around the local area on short trips in light traffic before 18 and commuting in rush hour to work.
I say this because all of the people I know who learned later than 20 did so because they’d need to drive for work, so they went straight into daily busy roads driving to commute, usually on their own in the car.
If we’re going to add restrictions on the first year you learn to drive, then that has to be for everyone’s first year, not just if you learn at 17. I’d always be more confident with a 20 year old driver who passed their test at 17 and has been driving regularly since, than someone who’s 28 and only passed their test a week ago.