People lie.
Drug addicts claim to spent 1000s a day on their habit. They don't, but it makes their loss and frowned upon habit seem less so, "I'd be a rich, upstanding citizen if it weren't for this one thing!", with perhaps the added causality chain of -> "this isn't a big hurdle to overcome" and -> "I can stop whenever I want to".
Same with work. Working is likely a negative experience for a lot of people, so anything that frames it to be less so, is memed. "Well this was exhausting, but I was so productive! I worked like what 80? 90? hours this week?", when in reality much of that time was typing long winded comments like this one.
The real magic of the "4 hour workweek" and similar books isn't finding the one idea that makes it possible, but to make working enjoyable. That seems to happen automatically with a shorter workweek (Kelloggs, Microsoft Japan) but you can get there with a regular job and being honest about productivity and I say that as somebody who thought it was impossible with a 40 hour workweek. I now do that and have a lot of energy to spare in the evenings.