You have to account for fatigue also. While a repeated process can drop into the 'automatic' mode where you're unfocused but still running through the task, cri

You have to account for fatigue also. While a repeated process can drop into the 'automatic' mode where you're unfocused but still running through the task, critical validations can be omitted when focus is not retained. These techniques guard effectively against that, as there are clear, focus-inducing markers when something is wrong in the process. This is the main thing you're guarding against. It's not complacency, or additional pressures... It's just plain old boring fatigue which on a long enough time span will hit every operator.