I'm not sure if the Polygon article and Thanos are really equivalents here.
Thanos presents an idea that's Malthusian in nature. It's an idea that's tangibly expressed in the context of the movie, and has real-world equivalents. In contrast, the Polygon article is criticizing Star Wars not for doing something or expressing an idea, but for NOT expressing an idea. One of these things is based on material that actually exists in a work of fiction, the other is grafting ideas from the real world onto a work of fiction. The former is a valid means of critique, the latter? Not so much. If my criticism of a work is for it to not do something, then what I can criticize it for can potentially stretch ad infinitum.
Now, there's technically a middle ground here, where people can read a work and derive meaning from it, even if the meaning being derived appears ridiculous. It's why the Escapist can run an article claiming that Gears 5 is a celebration of genocide, or more recently, why I've seen comments stating that the Harry Potter novels condone chattel enslavement, colonialism, and as of Crimes of Grindlewald, supporting the alt-right. But even these things are taking stuff from the text, albeit interpreting it in a way I find...iffy, to say the least. The Polygon article? Not so much. Though it somehow takes Rose's comment about saving what we love as an argument for conciliation with the First Order...somehow...so there's that, I guess.