It’s mathematics. Your society ceases to exist surprisingly quickly if people don’t have kids. And as one of the immigrants folks in the first world are counting on to perpetuate their society, the child hostile culture still sucks. I don’t think my parents appreciated this aspect of moving to America—raising kids without the network of parents you can count on in other countries. My wife and I had kids at a pretty normal age (starting at 27) and it was lonely waiting around for everyone to transition to that phase of their life (which for the most part never materialized). My wife and I grew up with boatloads of cousins, but my kids were alone except for highly structured activities. If you wanted to hang out with people who have kids you’ve got to go meet people a decade older than you. I’m a city snob, but I’ve been a million times happier after moving to an exurban neighborhood where there are normal people and lots of children.