Given the difficulty of affording a deposit for new home buyers who have been renting since 18 (like me - Aussie here), I can see the logic in it.
I would go so far to say that the only time this is not the norm is when children move to a big city to work, leaving their parents back in their smaller hometowns. Then they live as cheaply as possible in dorms that exist for this purpose. There's a whole infrastructure.