Earlier quoted context omitted.
Exactly. Ancient peoples were able to do all of their basic work in a few hours a day, the rest was leisure time.
That's trivially false. Ancient people were always working, and we can see this in people who maintain primative lifestyles. Take bread. You start the oven at 4am. By 5am it is hot enough for your meats. By 7am extinguish, by 8am start your bread and go until 6-7pm. Now you get to start your dough for tomorrow, typically working until 11pm. Historically bakers were known to sleep in flour hoppers as they were spared…
Ancient Rome worked on an 8 day workweek, and traditionally the 8th day was a rest day.
Ancient Greeks didn't have weekly days off... but they had up to 120 festivals a year where shops and businesses would be shut down.