Indeed. The age range defined as ‘younger driver’ is a very narrow band of 8 years, so perhaps around 12% of drivers, yet they are involved in 21% of injurious accidents, something that is quite obviously backed up by insurance premiums.
My son passed his test 18 months ago at the age of 17 so we went out and bought him a car, for him to get his first insurance premium down to a little under £1100 we had to include myself and my wife as named drivers and also fit a black box. Without a black box there were very few companies that would quote and the cheapest was still close to £4k. Myself on the other hand who has been driving for nigh on forty years, insurance is a couple of hundred quid.
The insurance companies are like bookies, they aren’t in the business of losing.
Perhaps it is the younger drivers that should be tested every couple of years, with the retest frequency reducing as they get older.