Cant fault these comments. My take is they were able to fly daytime VFR to an extent that they survived. Now take an unexpected nighttime flight, illegality, plus sudden illness and a need to 'save a life' and the boss demanding it, and you have a set of circumstances that would stretch or degrade many competent pilots. Degrade pilots that demonstrate no CRM and are already marginal either in terms of PIC or as a crew and it becomes dangerous.
Once again it may be a failure to say no. A failure to resist the employer or commercial pressure. It happened with Michael Harding with a pilot leagues above this PIC in terms of capability and competence, and it is very hard to prevent it happening again.