Fat people don't understand that being fat isn't some detail that can be overlooked, it's something that affects every aspect of your life. Saying "I'm a wonderful person and I have a great personality, and if this guy sees that, he'll certainly look past my weight!" is like saying "I'm usually a law-abiding citizen, I give money to the poor, I hold doors open for old ladies, so surely the cops will ignore the fact that I'm a child molester!"