Earlier quoted context omitted.
You think that today in 2019, we spend more time at "work" than at any other time in history? That's just false. Over the 20th century here, work hours have slashed in half. Henry Ford introduced the 5 day work week in 1926, prior to that it was 6. You think the average farmer in the late 1800's worked 40-50 hours? What about the average coal miner, or factory worker?
You're not thinking on a long enough timescale. Hunter gatherers only worked 10 hours a week :)
How much time was spent in meetings, how much time preparing food, fixing clothes, patrolling territory, scouting things out, making home improvements etc.
If the modern person only worked for food, then I think a few hours a week would suffice.