You're playing an NES game, a typical sidescroller, and the control is what it usually is. A is jump, and B is run, or attack, or whatever action the developers had in mind. Breaking this conformity just for the sake of being different has the greater risk of frustrating the players, and breaking the immersion the developers otherwise worked so hard for. When these are altered, Damn You, Muscle Memory! may occur; when unique new control features are added and not shown to players in tutorials, Noob Bridges may occur. This is why we have Stock Control Settings.