Harry Potter is not a Saint. Nor is he a Savior. He is by no means a Hero. Nor a good person. He wasn't even technically a 'person'. And he wasn't going to pretend he was. Harry hated troublesome things. He didn't have plans to save the world. To usher in a new era of prosperity. He wasn't going to contribute to humanity. Being Human was a chore, filled with troublesome norms, so he threw it away. His goal in life was to be a bonafide cat living in the alleys of London. His greatest contribution to humanity would be bringing a smile to someone's face as they took in his cuteness. And that was good enough for him. Of course the life of a magical cat living in close proximity to the hidden magical community could be anything but normal.