has it happened because you initially implemented code based on false claims or because someone edited page and everyone obeyed rather than reverting them?
If you expect it to be Bible that can be blindly followed - then it is an utter failure and always was.
In my experience whenever you want to do some serious project involving OSM tagging a large part of using Wiki goes into review/fixing/discussion of fixes for discovered contradictions, false claims and confusion. Nevertheless wiki remains useful.
Surface=fine_gravel - is it for loose gravel or duplicate of surface=compacted is an example of discussion I started on encountering dubious wiki documentation (instead of following it blindly) - and unless someone else did it, wiki still needs to be updated based on discussion there. Other wiki pages about surface also had some wild false claims that I in part fixed (with review by others and so on) but also had useful info that I would be unaware about without the wiki.
Opening_hours:covid19 tag - 2023 discussion is another that I posted recently.