It is a concern that the very SOPs for a turn back that he developed were ignored
SOP's are written to cover the lowest experienced individual. A highly experienced individual, such as Cameron, of course can outperform a nugget. In deed, some operators lay down limits according to the level of experience. An extreme is "Captains Only" requirements.
Apparently, when CASA tried to heavy Cameron, the reply was why didn't the CASA engineers who inspected the aircraft on import detect the engine anomaly (was first of type for the operator). Wind died to zero.