Perhaps I understood, because I have previous knowledge of the idiom, especially when it comes to the "couldn't care less" variation. However someone encounter

Perhaps I understood, because I have previous knowledge of the idiom, especially when it comes to the "couldn't care less" variation. However someone encountering it for the first time can only go with what is written, which clearly states that the subject "could care less" or "give a flying fuck", when the intent is entirely opposite.