I 100% agree about death and health as part of a financial / life plan. My friends are often surprised when I tell them that my immediate family and I have discussed death / the event if one of us (especially my parents) fall ill, in great detail. My parents always wanted me to be aware in case something happened to them so that I could also make sure my brother is taken care of.

Now we are both adults, but I still find it reassuring to know that in the event my parents do fall ill, we do have some contingency plans in place - although I'm sure no amount of planning can prepare you for everything, as you mentioned.