I think it is instructive to discuss these deaths, other accidents and mistakes in our mountains.
<If you really want to know what happened study the SAR reports and learn from the mistakes & ask the experts what the circumstances were. The rest is all speculation.>
Yes, I agree.
I've read SAR reports along with news reports. I save people from themselves in the mountains on semi-regular basis in winter though I am not a SAR volunteer.
You can make some assumptions off of knowns. Mr. Kato was observed on the summit with a severe case of AMS. Having had a severe case of AMS on a 14,000' mountain and knowing its effects, I can speculate he took some of these symptoms higher, he had problems on a difficult section of trail returning and they contributed to his death. What you can't do is say you know for sure.
