No, the point is who knows what types of apps will be deemed undesirable next? IE. What if Apple decides that they'd rather have only the top 1 or two apps for

No, the point is who knows what types of apps will be deemed undesirable next? IE. What if Apple decides that they'd rather have only the top 1 or two apps for a category? That having only one throwing physics game, or one tower defense game, is what customers really want? Sure, that's ridiculous, but it's not THAT far from Apple's history. Or, maybe apps that let you play musical instruments compete too much with the new Garage Band. The point is, there is no limit to what Apple can change.