I can see why on the surface you might think it's a conservative meme, but it's not. It's poking fun at how rigid and yes potentially racist fantasy settings can be.
Racism is a fantastic way of introducing conflict without having to come up with a particular reason. And stories without conflict are often really boring. Comes with the bonus points of being realistic.
They must be something else though. As even Melkor was not able to create, only twist and distort. I doubt his lesser could do that which he could not. I don’t think even Saruman could create life.
I dont think there is a canon to the Uruk hai origin other than they are "...cross between orcs and men...". The depiction of them coming from the ground is just how Tolkien described "...worm their way out of the ground like maggots..."
In reality its likely slaves of Sauron and orcs making Uruk hai in a not so pleasant way
You're just trying too hard to justify the meme, OP's title is about cancellation, probably just copied wherever OP found the meme, and the meme itself is phrased to push the point that "woke" ruins even fantasy literature, this is a Right wing meme post.