Interesting add, I guess the one thing that comes to mind is people tend to perceive work that is different as more fulfilling (due to diminishing marginal returns). So, the assumption that gathering berries and hunting is more fulfilling than a desk job is in part driven by most people's experience working at a desk their entire professional lives. It seems less obvious to me that hunting and gathering is an inherently more fulfilling type of work, but rather is such a different experience than a desk job that it would be more satisfying in the short-term. My guess is that this fulfilment decreases once you have been doing it for a long period of time. 

As someone who is clearly not a hunter-gatherer, I wouldn't say I have good intuition regarding the long-term fulfilment of such a job and it could be that it is more rewarding. My main point is that at least some of the "Eden" myth is driven by the frame of reference. If people believe humans now are unable to appreciate the benefits of modern society from a happiness standpoint, why would we be more likely to appreciate the benefits of a pre-agrarian society? Would we not also take certain things for granted and want more than we have? (this question is only in part rhetorical and if anyone has ideas I would love to hear them)