I do believe that if people have good "unofficial" unwritten/unspoken manners and customs, pretty much any official "system" can work. Conversely, if the unofficial stuff is not on point, you'll have all sorts of trouble even with a theoretically good system.

It's like "Thinking Fast and Slow". Fast, unofficial, unconscious part of decisions and actions versus the slow, official, conscious part. The unconscious is more important in many cases.