Miguel Mantas
New
If being open minded, and flexible to exploring new ideas and approaches to issues clearly as alarming as two experienced divers, one a dive master being severely injured and a customer under their care being killed paints one as you describe than so be it.
This death has been one of a series of previous other close encounters and shark attacks in the Cocos dating back over the years, it's now resulted in the culmination of the death of someone. It's a pretty serious thing and shouldn't be treated as lightly as "just the risks you take" or try to be nullified with the typical "mistaken identity" or the other rationalizations the dive industry promotes about "rarity". The Cocos dives are not sold as extremely risky with the chance of severe injury or death occurring on your dive due to the unpredictability of diving with Tiger sharks. I don't ever recall any marketing even mentioning you'll be diving with tiger sharks, the marketing I'm familiar with touts whale sharks, hammer heads and mantas and the only requirement is an open water certification which opens the gates to plenty of newer divers who have limited to no experience with anything approaching tiger sharks.
These are exactly my thoughts...we cannot determine procedures based on the most experienced participants. Risk should always take into consideration the more oblivious kind of people that can happen to show up...that is how you deal with potentially risky subjects in every other field of activity...