Right. Like other things that get passed down, parts become missing, like the fact that it was assumed that someone would be refereeing the match with all ball foul rules. The WPBA's written rules have been for cue ball foul only, except when otherwise stated as in certain circumstances with a presiding referee or when having to follow certain WPA rules. Men's pro events in the U.S. have always been adapted to cue ball foul only when there were no referees at each table, but lately the players are being forced to now focus on their opponent's shirt fouls due to the influence of organizations like Matchroom and the WPA.
People here are criticizing cue ball foul only rules, and I guarantee they don't even know what they are. These rules don't give a player the right to push object balls around and leave them there. It has to be addressed before the player shoots --- and it is up to their opponent to determine how to address it. The opponent has the right to tell his opponent to go ahead and replace it or leave it where it landed, or he can get up and replace it himself. And if an object ball was moved by a player's arm or body part during their execution stroke and the cue ball winds up hitting that ball as it's traveling, or if it interferes with the outcome of the shot, it's a foul. If it's moved by their pool cue during the final stroke, it's an automatic foul. How much more fair do you want?
WPA rules are a compromise of all countries. They are not specific to any one country, so there will be compromises made by countries, some more than others, depending on what was voted in.
The all ball foul rule is idealistic at best in the absence of a presiding referee, and not a favorable choice for players who would rather spend their time focusing on playing. Forcing rules and ignoring common sense at the same time is a bad precedent. We in the U.S. recognize that and appreciate our players.