[PeanutCurry]

I'm not entirely sure I understand your metaphor in this case. I appreciate that it had something to do with efficiency but then I got lost because a 20:1 farmer-to-other feeding ratio seems incredibly unrealistic and made it hard to understand whether the ratio was relevant to the metaphor's point or was just an off the cuff sort of detail.

[Mz]

It isn't a metaphor. Without modern farming technology and techniques, the world cannot support 7 billion people. We deal with that fact or we die in droves. Those are our options.