When you have kids and enter middle age, you think about what you will leave behind you for the future, for future generations in your family line. Everybody does that, I think, in their own way. It's the way culture and subcultures are maintained.
Valued (or not) material items and photos are one sentimental part of that, but these things become diluted and dispersed over time, as does any money that is left behind. A family's cultural traditions, habits, and pleasures are the best inheritance to leave behind with hopes that they will carry meaning and value as far into the future as you can throw them. Messages from the graveyards - from your own future graveyard, and those of your ancestors.
The parental job is transmission of genes and culture, and the provision of food and shelter. That's about it, but it's not an easy job in today's world. If you were a serf on a lord's estate in England in 1300, it was an uncomplicated if tiresome job.
What's your opinion?