This shows how discrimination works that you are only good for us if you have a use for us. This is a growing trope in manhwa and its very tired and sickening. The holier-than-thou hero will never thirst for revenge, will question his motives, and will never try to accomplish anything than his desired goal which will be side-quested until the end of the series in one of the most boring wrap-ups I've ever read. The plot and setting are there, but holy shit is this basic cookie cutter character. He doesn't revenge because he isn't, "like" those that hurt him. Comes off as the most unrealistic bullshittier cutter bullshit that instead of being discriminated against he is now worshipped because of the use he provides them. The type of character/person that is used by worst of people to get their dirty work done and then toss them out because they no longer have a use.
Holy shit, I hate characters like this and it drags down the story and everything into the fucking dirt.