That is why it is allowed to buy morphine by the pound at Wallmart, you are trusted to understand the consequences and use it right.
More seriously, the actual objective is not blaming the guilty but rather avoiding the problems.
If system A interacting with system B is likely to causes an incident then either A, B, or the interaction need to change.
For surgeons all three have happened, the same for airline pilots.
The surgeon had to swear very convincingly to have "read the documentation" before being even allowed to think about "holding it wrong".
In the case of people using GPG wrong the only solutions you have is to make is easier to "hold right" or make is so heavy and painful that anyone without true determination gives up trying to "hold it" at all.
More seriously, the actual objective is not blaming the guilty but rather avoiding the problems.
If system A interacting with system B is likely to causes an incident then either A, B, or the interaction need to change.
For surgeons all three have happened, the same for airline pilots.
The surgeon had to swear very convincingly to have "read the documentation" before being even allowed to think about "holding it wrong".
In the case of people using GPG wrong the only solutions you have is to make is easier to "hold right" or make is so heavy and painful that anyone without true determination gives up trying to "hold it" at all.