Ackushally he made an abomination that was both genders that he cut in half to separate the two genders. The “rib” is just a polite way of saying cut down the middle. And I think why the ballsack and taint has a zipper line. I don’t know, it’s all silly anyways, but at least get the deep lore right!
"god doesn't make mistakes" cuts both ways. if you're not comfortable with your assigned gender, that's because god made you that way, and therefore your actions to correct your problems is part of gods plan
And that kids, is how the McRib was born