I'd say 90% of driving is good/safe driving is mental, with at least half of that bening based on the decision making capability. Yet our tests are mostly focused on physical ability with a small amount of memorizing a subset of the rules.
The multiple choice and practical exams are not done by the school, but by an accredited / governmental institution. Each have a ~30% failure rate.
Counting 1 lesson unit as 45 minutes it’s definitely not quite as rigorous as a PPL, but certainly in the same spirit, I’d argue.
Being completely honest, I did not feel totally comfortable behind the wheel until maybe a week or of actually driving myself, post-license. (Not that I didn't have a lot more to learn, obviously)
During that week, I could have easily gotten into an accident and did have one or two closer calls.
I would not all be opposed to maybe an additional ~10 hours of more rigorous behind-the-wheel driving, or a very good-quality sim for that same amount of time.
But realistically, I'd imagine making this a hard requirement would hit some massive walls. Good simulators are expensive, everyone wants to drive, and states have very limited budgets for this sort of thing.
A driver (bot or not) needs very good reactions to bad situations observed in the field. And ideally a good sense for when a situation is one step from trouble. As a driver, if I can’t see through a bus then I’m going to assume a crazy pedestrian is waiting to jump in front of me.
(A lot of drivers are quite bad frankly and don’t do most of the stuff you’d want someone to do if they’re directing a one-ton blunt weapon around town at 35mph.)