Thats not true, these men are highly trained and conditioned athletes, who happen to compete in a combat sport.
Some low level heavyweight fights resemble bar room brawls, but fighters of the calabre of De La Hoya and Mayweather are unbelievebly skilled offensively, and defensively, which will lead to an intreaging tactical battle.
I feel Mayweathers superior spped and reflexes will outweigh De La Hoya's natural size and strength advantage, leading him to a close but clear unanimous decision.