If it's not women having kids, then who the fuck is it going to be? Men? Women have the monopoly on having kids. I know several men who would like to have kids, but because of Feminist women who are so focused on their career, haven't found a successful relationship.
Western countries shouldn't be relying on immigration forever. Maybe the country was "built by immigrants", but those were white European immigrants, not the 3rd world cesspool we have been getting for the past 40 years.