Because most bodybuilders can't think for themselves and are extremely infantile have shitty culinary skills and try to dress up their foods with all sorts of condiments and shitty stuff like stevia, aspartame, cooking spray, egregious amounts of spices a la Dusty Hamsaw, lowfat cheese, fat free mayonnaise, turkey bacon, and so on.
Remember the orange roughy and Pop Tart crazes?