And they probably don't want to leave the area. It's difficult to leave a network (familial or professional) behind. I'd love to know how many people who made that move made it to start a family.
Ahh! This would be a cool longitudinal study for the census to follow up with. Asking “Did you move to form a family because where you left was too expensive?” but also observing the revealed preference (did they actually have a kid or kids after moving).
