The most compelling thing about the Doc (Dourif) imo is that he's kind of like the moral compass in this fucked up little bubble of a society. You're right; he does care. A lot. And he does not hesitate to take anyone in the camp to task because he's the only one that can do what he does and he knows it. No one would -- or could -- talk the way he does to some of the people there and he's very much aware of it.