The main meaning is that when building a house in the countryside, most people like to build it in a place with a large flow of people, and the bad place is on the side of the road. This is like an arrow pointing at the house. Arrows are a sharp weapon to hurt people, so people in rural areas think that such a housing structure is unlucky for people.
In fact, according to today's thinking, you are building in front of the house, although it may be more suitable economically. Because where there are many people, there will be transactions, and there will be economic flows when there are transactions. But from the point of view of safety, if you build a house on the street, you have to bear great traffic risks.
For example, if someone is drunk, he may crash his car into a family in the street, causing harm to the family and money. This is what "ten people and nine casualties" means.
If you want to ask whether this sentence makes sense, it is not a feudal superstition, although it is a traditional taboo in building houses in China. Because it has some truth in itself, it is the crystallization of our ancestors' labor wisdom.
He is reminding us that when building a house, we should always pay attention to the choice of personal safety. After all, for everyone in China, a house is a life event. With a house, there is a place to shelter from the wind and rain in this vast world.
So when building a house, people will pay more attention to it. The credibility of this sentence mainly lies in their consideration of unsafe factors on the road, which is really necessary. After all, there are countless such phenomena in today's society.