Is it normal to want to know how a person died?

It appears that one of my former class mates has died. This announcement was made on Facebook. Several people have asked how it happened because he was relatively young. I want to know too, but since no one is getting any answers I assume they have their reasons for not telling.
I understand that if it was something like a suicide they wouldn’t want to broadcast that.

My question is, why do we want to know how and why?