You might be surprised to hear that there’s a lot of anime/manga about mahjong. I’m aiming to watch/read all of them (or at least what’s available in English, there are even more manga series that are still untranslated).
Akagi is without a doubt the GOAT of this weird little subgenre.

























The term “facial recognition” has a specific meaning. You are trying to break that down into the most literal interpretation of the word ‘recognize’, but that’s not what the full term “facial recognition” means. Compound terms have more specific meanings that you cannot just redefine by taking part of the term out of context.
“Facial recognition” means using a picture of a face to identify who the person in the picture is. This has all sorts of privacy concerns, especially if it’s done without consent.
“Face tracking”, on the other hand, means simply tracking the position of facial features to map them onto and animate a 3D model. This is the same technology used to animate VTubers. As long as they’re not using it to identify who that face belongs to, which we have no reason to believe that they are, this is harmless. Even if it truly scares you, you don’t have to turn it on, this feature only works if you opt-in.