My comment is aimed at the forum in general.
What is an error? I believe it to be 'an undesired state'. How do we arrive at this.
If a person makes an error, why do they make it
Lack of knowledge
Lack of understanding
Lack of ability
Lack of process
For each of these examples (non-exhaustive) there is some degree of negligence on the part of the person or the system.
I hypothesise that system error counts for around 80% of all undesired states. These are the errors that need to be managed first because they are the easy ones to correct.
Changing human behaviour will take many generations although I personally do not support the position that rationalised training programmes or increasing automation in aviation will make a positive contribution to reducing errors.