Billionaire philanthropy is like doing 100 damage to humanity, then returning 5 health. Then the 5 health gets amplified by information channels and it gets to feel much bigger in the collective consciousness. It gets a further boost when there's other prominent billionaires that don't give any hp back making it stand out as the good guy. So you end up in a bizarre position where objectively the philanthropist is the good guy compared to the rest, but the vast majority of us have no hp left.