Maybe they're radical in that they don't care about you, and what you think books should be about.
But let's turn this around - have you actually read any of them, or are you just saying "meh, feminism, not my thing" and discarding them out of hand?
Based on the ones I've read, both "Dromedaries" and "His Masters Voice" are very much radical, especially if you read them in their historical context. You can certainly argue that ultimately, the topics and stories are a bit more familiar nowadays than they were then, but they're still quite thought-provoking. (If you read one of those two, I'd go with "Dromedaries". Lem is many things, but certainly not an easy read)
I think the url ("/queer-feminist-sci-fi-books-polish-literature") is a more accurate description than "Radical Polish books to add to your reading list."
There are a zillion books out there, most of them crap. So simply "try reading them" does not really work, there have to be some good reasons to pick up a book.
Sure. There also have to be good reasons to dismiss something as "not radical". Nobody is asking OP to read all books recommended on the Internet. But if they'd like to spout opinions about them, I think "have you even read it" is a valid request.
If they are being described as belonging to a certain type of books, I don't think you have to read them to have an opinion. Like if a book is described as "feminist", you can have a pretty good idea of its contents.
