It's boxing. The whole sport has always been corrupt.
Also, I'm fine with the outrage being over Mayweather being a scumbag who beats women and is just generally a terrible human being rather than this.
Watching that fight, I doubt it made much of a difference. Pacman was a shell of his former self & Mayweather would've stilll probably just kicked his butt. It was a pretty one-sided fight. Especially the latter rounds.