Your complaint and data aren't about the same thing which is slightly confusing.

I would argue that Graeber's rhetorical question is just there to question the absurdity of that articles own assumptions. For, realistically, if production was so much more complicated (pieces of the production process scattered around the world etc) it would also incur extra cost .. they ship around the world to save money.

But I agree, its quite likely there have been statistically increased changes in leisure. However, that's not really the point. I'm not even sure Mr. Graeber knows how important these measures of importance are in our lives, but I think he makes a lot of compelling claims. Especially since, well I don't know about you, but when he talks about the arrogance of those people who think if workers don't find value in their jobs, that their just being overly self important. This kind of inane logic (and probably loss aversion for themselves, as Graeber puts it "the visionary entrepreneurs") needs to be confronted.