First of all, I have read 1984, and I wouldn't take issue with the analogy if I hadn't. Whether you have read any other books, I cannot say.
Second, you say Orwell isn't a linguist, and language just happens, but then you explicitly reference his fictional account of a prescribed language. Clearly, Esperanto is a prescribed language. So prescribed languages do exist, and political forces can shape languages, you just don't think that happens with English. Well I do. People reference so-called "descriptive" dictionaries and grammars, yet don't those texts themselves inherently acquire a prescriptive force, insofar as they originate at elite institutions like Oxford and Cambridge and UChicago? Just as Dante's works acquired a prescriptive force for the Italian that was once highly regional, but needed standardization to support the nation-state.
I think descriptivism is an incredibly naive position to take when talking about modern languages that have agglomerated for explicit social, political, and economic projects, and I think that was Orwell's point.
Similar to David Foster Wallace's essay on English, we can either naively push the descriptivist line, or we can accept that "the powers that be" do indeed shape our language, and try to have our own voices heard, for what English ought to be.
So we can rail against the Newspeak that some editor on Wikipedia is supposedly forcing on us. We can say it's literally 1984. It's ungood! And we can happily return to talking about grokking and gatekeeping and unaliving, and undocumented immigrants, and unhoused people, and utilizing the new library, believing these words are good because they happened and that they happened because they're good.