Safety Culture.
A safety culture is designed to find out what went wrong and to identify where changes can be made to mitigate a repeat.
It's not there to point the finger of blame and fire people. Nobody would report anything if that was the case.
If an in investigation reveals that a particular individual is a repeat offender and is unable or refuses to mend their ways then yes, redeployment or disciplinary action may be necessary.
It always used to be the job of avionics trades to break down O2 systems as their tools hadn't been anywhere near grease or oil, ever.
In addition, at least one airline I know of used left handed threads on O2 unions and servicing equipment.