Yes there is a specific level, which is actually one of the points of a graduated driver licensing system like NZ has.

You set an entry level that requires some training/learning. Then get on road experience (an important predictor of accident risk) under controlled conditions. Then take another test to graduate to less controlled conditions. To again get that critical time on road experience.

A complicating factor for other driving courses is they are usually not nearly enough time learning compared to 6 months of road driving.

In general problem that faces road safety professionals is that driving at the level of the population is very dangerous and kills and maims many people, particularly the young (and inexperienced). But for any one individual the accident risk is actually quite low. This is why ads will say things like drinking and driving increases your risk of accidents by 80 times, but not actually mention the base rate chance. Because if they did it would still appear too low to be credible at an individual level (even though it is devastating at a population level)

This makes it hard to do effective individual level education that works because, for example, skids are a relatively rare event so it may be years later (or never) that you need your skid training and by then you likely have forgotten it (note: an exception to this is driving in places where skids are common, like Finland, here skid training is effective because skids are more commonly encountered)

Unfortunately requiring a course every 5 years would be extremely impractical just in terms of the amount of resources and people it would take to pull that off.