[prutschman]

If existence is pointless except for procreation, what is our children's purpose? To have children, in order to have children, in order to have children? This is unbounded teleological recursion, unless you allow for a basis case in which any given life also has meaning for its own sake.

Myself, I hope for more for my own two children than just that they have children of their own some day, just as my parents didn't have me only in order that they might someday have great-great-grandkids they'll never meet

Culture and ideas transmit through channels parallel to heredity. Celibate monastic orders are one obvious example.

I want to live in a diverse culture for a reason analogous to why I'm wary of agricultural monocultures: All it takes is the right virus to come along, and all of a sudden we don't have any bananas anymore. There are some tragic failure modes associated with strong, cohesive, anti-"diverse" cultures.