Just culture helps with bringing the organisation to account, not just the ATCO with the microphone. You pushed the button, it is your fault.... I do have experience in this area and I am providing evidence to defend ATCOs in various cases at the moment.
There are many safety cases around in ATC that are inadequate. The usual failings are those of inadequate risk criteria and risk optimisation criteria, poor hazard identification carried out by unqualified staff, poor quantification with that 5x5 matrix that does not stand-up to any real examination for big ATC related accidents, poor human error analysis, poor equipment reliability analysis, poor procedure design mistake analysis as well as poor risk monitoring. Don't even get started on the lack of safety cases for current operations and ignoring capacity increases as a change to the system.
The barrister's opening question to the author of the safety case of please outline your psychological, engineering and risk management qualifications to be the signatory of this document is a good one.
Beware public expectation!