But yeah, the analogy isn't perfect. And the academic nature of the metaphor's subject was obviously going to invite some rube to point out how it's not 100% spot on and how that's well worth talking about.

You're just arguing my greater point anyway: Your chosen level of perspective with these metaphors (and real issues) will invert the design philosophy. At one level, everything is different and using different means for the same goal, at another level, everything is the same and using the same means for different goals. If it's not organs, then its cells, then its "extracellular material and are dead cells different from live cells!?", then its atoms and then quarks.

But please, go ahead and educate me on how atoms aren't all the same and how that too is a critical point to be made in this conversation.