This is related to the life span of people in the past. In the past, people's life expectancy was generally short. When they were teenagers, they got married and had children. At the age of 50, most of them are grandparents, and their life expectancy is running out.
It takes energy and money to know the age of destiny and then build a house. It is also possible that this family property will lead to discord between children. Why bother?
Building a house is not a small project. For a family, it takes a lot of manpower, material resources and financial resources. Besides, it's very frustrating for people of such a big age to do these things. He needs to go in and out and has no energy.
On the other hand, people in the past knew their fate at the age of fifty. Since the number of years of life is running out, if you can't distribute your property before you die, it will bring endless trouble to future generations. As a large part of the inheritance, real estate is not as easy to distribute as cash. So there's no need to bother. If there is anything wrong with the house where a 50-year-old lives, just fix it.