No, your not wrong. Every league, every 8 ball match in a local bar has different rules. Rules are often created under the heat of the moment when the cocktail/pool player/ego incident arrives, where the more dominate/local male/female... creates a rule to benefit their moment, to win that game. All leagues have different rules, often these rules are in place for the vendor not the sport, this is an area that will never be addressed across the board till the game becomes a true sport, supporting the game, not the politics of the moment. Cyclops balls are a good example of the vendor creep. But hey,it's a business and they have to look at the bottom line to be successful.
Just a little over generalization and a lot wrong with your entire statement.