The article is rather long and I didn’t manage to read it all. But why wouldn’t this be done like a lock, where the shape of the key determines how far (or in t

The article is rather long and I didn’t manage to read it all. But why wouldn’t this be done like a lock, where the shape of the key determines how far (or in this case which) pins are pushed? That way, you never have to touch the rotating wheel directly. The key then would just be an internal wheel that rotates and pushes out the right pins. If it works for a lock, surely it would work for something with much less resistance? Edit: nvm, they discussed this and dismissed it, although I don’t fully agree with the reason.