My dd is about to turn 18 and passed her driving test 3 months ago. I have been in the car with her several times and feel as safe with her as anyone else, obviously she’s still gaining experience though but can see her gaining in experience and confidence each time we go out.
We’ve drummed it into her since she started learning, the responsibility that comes with driving and potential consequences. She has openly said to anyone she gives lifts to, if they muck around whilst she’s driving they’ll have to get out. She’s in no hurry to take the P plates off her car and make it clear to other road uses she’s a new driver.
For milestones such as motorway driving, driving in the dark etc, she’s been out with an experienced driver before doing it on her own
its perfectly possible to drive safely at that age as it was for us so I don’t think the age should change. However I do think laws could and should be tightened (e.g mandatory black boxes that monitor speed, limits on engine sizes, a time period before carrying passengers etc). There’s plenty that can be done to addresss problems caused by less mature 17 year olds without limiting the more mature from having the same independence we had