[Serious] Why defecation?

[Gawdzilla Sama]

I held back.  Nope not gonna drop it.  Then I see it all around.  Everybody does it.  The signs are all there, let it go.  It's okay.  But no, I have to stay clenched.  

What kind of sick fucker puts a serious tag on a poop thread?

Because threads tend to degenerate here and I am asking a serious question. Kinda thought that would be obvious.

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God created all the animals, right? So he created all their systems, right? So the best system for taking in energy and disposing of waste involves shit, right? Nothing better occurred to an omnipotent omniscient being?

And I know there will be a lot of "yeah, butt!" posts. Please prove your points.

Well there is one animal that doesn't defecate, the demodex.  This can cause health problems for people who have large numbers living on their skins.

There's a moth that is comes out of the chrysalis without any mouth, so not input and no "output". They starve to death within a month so they have to get down to business quickly if they want to have another generation.