One hopes that instructers are trained to a much higher standard, perhaps to Police standard, then that would filter through to pupils ,thence to driving public.
It's my opinion that it is a very low standard drivers are passing, it shows in the street ,with road rage, speeding, bad parking , running lights, I need not go on,.
The same can be said of bicycle users, but not Cyclist', I make the distinction, Cyclist will take a little more care,it's self preservation.
I will point out ,if there is any altercation, when I cycle, I can be pretty sure that I would not be the cause of the problem , apart from being on a bike in the first place, I have to balance, power , position and keep a good look out to make it safe to ride.
In a comfy tin box the driver only had to push pedals, pull levers, twiddle switches, some even park automatically!
It's no effort to drive, motorist should take head of that.