What's the difference? Especially when it's been obvious since your first post (you were in fact the first respondent in this thread) that your thesis and everything that has followed, no matter how well stated, has come through a cEDH filter. "Wishing shouldn't work in Commander because it might interrupt my game of solitaire." is not an argument against Wishing in Commander.
Fortunately for cEDH players, even without Rule 13, sanctioned games solve this problem. In a world where Wish effects function in Commander according to Wizards' rule on them, the solution to the cEDH players' dilemma would simply be to play in sanctioned events. That is the strength of defaulting to Wizards' rule on Wish effects rather than Rule 13: It would let never-Wishers play sanctioned events in order to avoid Wishing and Wishers to play unsanctioned events in order to enjoy Wishing. Both would be equally legit regardless of opinion or mood, and official in every sense of the word, and put the onus on standardized rules instead of heaping the burden of responsibility on the players. Yet it would still empower players to evoke Rule 0 to decide if they wan't to play as though they're in a sanctioned event, even if they aren't.
That being said, players wouldn't be forced to resort to Rule 0 to Wish, which when it comes to Wish effects, is always a bad experience for everyone involved. It's a false analogy to compare hashing out Wish effects with Rule 0 and hashing out deck power level with Rule 0. It starts the game with what is essentially an argument. It is never comfortable or pleasant and sets an awkward, uncomfortable vibe for the rest of the game (if not the day) regardless of what decision was made. Wishers don't want to ask if they can Wish and never-Wishers don't want to be asked if it's okay to Wish. Never-Wishers don't like to tell Wishers "no" and Wishers don't like to be told "no". If the Wisher may Wish, nobody feels like they're playing a real game of Commander. If the Wisher may not Wish, everyone's mood ring turns amber. It's all very childish. The notion that "Rule 0 makes it super fun to hash out Wishing before games" is a total fantasy. The exact opposite is true. Doing away with Rule 13 and defaulting to Wizards' rule would solve all of this.