All good points, but I don't understand the title.
That’s in the 4th or 5th paragraph. That’s the human anatomy the title is referring to.
Perhaps the submitter thought the title was linkbait, but I don't see it that way and have reverted it now. Generally we try to avoid euphemisms and Bowdlerisms here. It's better to assume that readers are smart enough to handle things for themselves.
So they are basically saying that America is not made for people who have actual human bodies, that need to pee and poop.