Earlier quoted context omitted.
The real issue is all the current bad drivers. A requirement to start re-testing normal people in addition to the elderly would be a large benefit to society.
I'm from the UK, took driving lessons in the UK but then passed my driving test in the USA (in California). The USA driving test is so much easier than the UK one! UK: Varied junctions and roundabouts, traffic lights, independent driving (≈20 minutes via sat nav or signs), one reversing manoeuvre (parallel park, bay park, or pull up on the right and reverse), normal stops and move-offs (including from behind a parked…
But I've heard of areas that's it's easier, too, like your CA experience.