I have read it. I have also read several cases which cite it. Citations of legal precedent aren’t specific, they don’t have to have the original circumstances in common with the original case to use it as a precedent. Any ruling made in such a case can be used as precedent, for example, in British Pregnancy Advocacy Service v Secretary of State for Health and Social Care 2019, Pinner v Everett was cited in reference to how the phrase “first day of the pregnancy” should be interpreted, because Pinner v Everett contains precedent about how natural language should be interpreted.

It is completely understandable that you don’t know how legal precedent works, but I’d politely suggest that you should avoid getting into arguments about it on the internet, at least not without properly learning more about it first.