And FYI, while he died unexpectedly young, a 57-year-old man in the US has only a 50% chance of living to see their child reach 23 years of age. I, personally, wouldn't feel comfortable risking leaving a child with a likelihood of dealing with my death at that relatively young age.
Obituaries mention surviving family members by convention, but otherwise leave very personal matters to the family.
The death of someone can be a reminder of our own mortality. Maybe a later HN post can work through some of those thoughts.