But this in my view comes down to the age old problem that exercises 1-12 are not being taught properly or being understood.
Personally I think the whole PPL deal woefully prepares any student for real life flying, they have to then do 100's of hours of trial and error or be in a position where they can afford and have the mentality for on going training.
Inevitably in that Journey a few fail in practice in the real world.
I am suggesting more enforced training or cost as that would likely kill of GA totally, our hobby has a risk and decision making is a key factor.