in my two meaning post
Literal Meaning: Opposite of the natural world
Accepted Meaning: Anything people make or cause to happen , or disgustingly odd
The one he means is the Accepted Meaning.
Your trying to connect Supernatural with Unnatural which cannot be done because any connection lies in the literal meaning which is not the meaning he intended.
He only intended one meaning because a word like that can mean different things.
Take this fail English translation.
The simplified Chinese character above can be translated as Dry or F***
I wonder which one it should be?
It's called common sense.
The word human appears in his picture in every single caption.
So, I would assume he wanted the first meaning of the accepted translation.