It’s worth acknowledging that Gladwell’s theory about Goliath’s pituitary gland is highly speculative. At the same time, though, it’s an important point because it encapsulates Gladwell’s overall point about advantages. Whether or not Goliath had a tumor on his pituitary gland, what’s important to grasp is that the very things that make him powerful in most situations end up working against him when David changes the rules of combat. If Goliath has a tumor on his pituitary gland, it is responsible for his hulking size but
also responsible for his inability to properly see his opponent. In turn, it becomes clear that strengths and advantages aren’t always what they seem to be, since hardly anything is beneficial 100 percent of the time. David’s main triumph, then, is his ability to recognize that Goliath’s supposed strengths can be used against him.