I mean the same holds true for what people feel about what happens to them versus what happens to others. You are measured by your external actions not the internal "well maybe I shouldn't have murdered the world" voice the rest of us don't hear.
If we don't like how something works, we should understand the factors that shape it. If someone's internal preferences are contrary to their actions, that's worth knowing, as it says something about the strength of the incentive structures. This is true for any person of any status, not least the rich, who, ideally, should not be destructive forces in society.
Private preferences and feelings are relevant to the analysis.
