Why was it said to be a rec center for retired officials?
Because when it reached the sixth and seventh season, the important characters portrayed in the series were all starting to become old.
Humans' physical constitutions had started to change during those 100 years. It had been a long-term process, not an overnight change. These changes had been more obvious in children born during the Period of Destruction. Other people had been able to see their constitutions change slowly day by day, but they still could not have been compared to people of the Old Era.
