I have not noticed widespread occurrences of 10-year old buildings being knocked down and rebuilt. Have you noticed this? Where?
A building takes more than a year to build typically; if they were being knocked down every 10 years, the entire city would look like nothing more than a construction site.
A building takes more than a year to build typically; if they were being knocked down every 10 years, the entire city would look like nothing more than a construction site.