What I’m saying is that the meme is usually used ironically. Here the OP is saying that he has a sexual fetish for a type of woman who doesn’t even exist. That is not something normal people respect or admit to. So the joke is that he thinks he’s superior but actually he’s not.
Then there’s a level of meta-humor because the OP is probably actually attracted to monster girls. So he’s a weirdo pretending to be a normal person pretending to be a weirdo. But he’s posting to a community of weirdos, and in that context he’s actually a normal person…