What are you talking about? Revenge is the entire purpose of him looking for Uncle Ben's killer. But then he, rightfully, gets told off by Captain Stacy and goes off to the bridge, trying to prove something, until he saves that boy. I love this scene, it's one of my favorites in the movie, he gives the boy back to his father and his father hugs him, and I don't know how Andrew Garfield does it, but in that one reaction shot I feel Peter let go of his need for revenge, I feel Peter find himself in that moment, and when the father asks him, "Who are you?" I feel Peter stand up a little straighter, with a renewed sense of purpose, now filled with a sense of right, and say, "I'm Spider-Man." It's beautiful, and it's perfect, and I honestly got choked up a little in the theater. You can't tell me you didn't feel that tremendous weight just lift off of Peter's shoulders in that moment.