People do want to have kids, but the physical process of going through pregnancy and birth is brutal and dangerous. The people who have to do it quite rationall

People do want to have kids, but the physical process of going through pregnancy and birth is brutal and dangerous. The people who have to do it quite rationally don't want to do it four times in the same decade once they have any other choice, even if it would be socially optimal. The best thing we can do at this point is develop the technology to create babies outside of human wombs.