Earlier quoted context omitted.
How about the cost of your life ? If the house resists the earthquake and you are inside it, you don't die.
Building to protect occupants and building to make the structure salvageable afterwards may be two different goals. Think crumple zones in cars.
Crumple zones in cars exist under the assumption that they will not be occupied by humans. In a house, on the other hand, any place could have a person inside of it during an earthquake, meaning that basically the entire house would need to stand to avoid any human being hurt.