You completely forgot that workers only work one time the shift per day. If you account for the total energy required to do a project, and assume that a human would do alone X in 5 days, then wouldn’t it be better to use prompting as well, which would theoretically, in this model, make X feasible in 2.5 days? Sure, the non-work calories consumption of a human is inevitable, but when strictly talking about productivity, you can make an individual be 2x more productive for a lot less than their daily calories consumption