Well, I don't think prescriptivism is entirely wrong. For example, I'm in favour of the correct use of "its" and "it's", because it's confusing to use the wrong one and a bit ugly to readers who notice the mistake. (Also, there's no communication benefit to swapping them, unlike some other contentious uses like using "they" for singular third person.) I believe the most pure descriptivist position would be that "wrong" and "mistake" aren't even meaningful words to use when talking about language.
So I feel I hold a certain position on the spectrum, and I call that an "opinion" because somebody could hold a more prescriptivist position overall and might have good reasons to do so, even if I don't agree with it.