Many people in the health profession (doctors, nurses, physician's assistants, nursing home attendants, etc.) go into it primarily for the prestige and pay. Or because they like biology and challenge and stuffs. The primary focus is not "helping people". They may end up helping people, but they aren't saints and helping was not their primary intent. It's the inevitable byproduct.
Also, the way House goes about what he does, he shows no compassion for his patients and goes further by being completely disrespectful to them.
I think that attitude "Well, I helped you so I can also be an asshole to you" could be a childish Fi dom/aux/tert response to something. But House's character is more "I'm being an asshole to you. BTW, I just fixed your lazy eye".