You are making an argument based on the personal attitudes of individual billionaires while OP is making a structural argument. So you are not really responding

You are making an argument based on the personal attitudes of individual billionaires while OP is making a structural argument. So you are not really responding to them. Further to the point, the personalities and temperaments of people is only weakly correlated with their moral quality, which is what you’re talking about when you talk about “doing good”. For example, many well meaning people who “like to do good” nonetheless participate in factory farming, which is a moral atrocity that subjects tens of billions of animals to suffering and death per year. If you don’t like the animal rights example, take the example of all the “like to do-gooders” who supported Jim Crow.