A fire and/or a steering issune has to be investigated the guilty parties exposed.
In fairness, there might not be "guilty parties" in either of Princess's recent incidents.
>> With regard to the recent fire aboard MV Star Princess, the ship was in compliance with all applicable safety codes, including the rigorous standards of the Safety of Life at Sea (SOLAS) treaty. Unfortunately, the fire exposed a couple deficiencies in those standards -- one involving permitted use of certain plastics for non-structural elements (balcony dividers) and another involving an absence of requirements for fire detection and suppression systems in external cavities (cabin balconies). It's unfortunate that the authors of the safety standards did not foresee these issues, but ships that would have suggested these issues were not prevalant when they wrote the standards.
>> With regard to the steering incident aboard MV Crown Princess, electrical and mechanical equipment does malfunction sometimes in spite of the best of test programs.
Also, it's much easier to get to the root of what went wrong if we refrain from playing a blame game. People who face adverse consequences such as criminal charges or dismissal are not too lkely to "'fess up" if they made a mistake. It's usually better, in the interest of a thorough investigation, to make the consequences of a really serious operator error something fairly benign to the individual, like reassignment to a suitable position in the company's headquarters where the individual has some opportunity for promotion and retirement with a decent pension.