It doesn't take a genius to understand that there are weight classes for one and only one reason. The bigger the man the more of an advantage he has over his opponent. Therefore some genius a long time ago figured out that a welterweight would not be in a fair fight with a middleweight. Just the same a middleweight would not be in a fair fight with a cruiser weight. Nor is a cruiser weight in a fair fight with a heavy weight. Now a heavyweight is also not in a fair fight if he is fighting a super heavyweight. Only someone with less than a quarter of a brain will fail to understand this