Thing is with pinball you have a theoretical infinite max score. I've never played this game, but I assume arcade mode is like pinball in that you play until you lose all your balls. I know the game itself may keep high scores but... well, there's probably some easy safe way to score slowly but surely and constantly, which cheats out the people who play properly.
But hey, that's just one side of it. The more games and the more variance, the better imo.