As for trying to blame the training and SOPs - purlease.... I come back to Occam's Razor on this. If you take bits of kit into the cockpit and it causes an issue, then you must at least accept some culpability. Otherwise, where does it end? "When my trumpet got caught in the throttle quadrant no one had ever given me any training on how to deal with it...No one told me not to take brass band instruments into the cockpit...etc..."
Reminds me of the RMT's response after the Croydon tram crash when it was revealed that the driver had been doing 40mph in a 12mph zone. Rather than admitting the blame of the driver, the RMT blamed the operators for not having the proper systems in place to prevent the driver from speeding.