Lol, ok so you're including labor cost?

A couple years of a dear 'gathering nutrients', vs a summer of cultivating a garden and harvesting? Or do I need to include the energy expenditure (energy ingested by the dear minus energy lost to biological processes, vs solar energy collected minus energy expended on building plant mass and energy expended in harvest)?

I was really just pointing out the absurdity of your complaint about the study but you're making this into a fun little digression.