You think that just because these people are the finest pool players of their generation, that makes them exempt from the vices and greed which infect almost all people?
I highly doubt that any of the names you mentioned were trained in morality and virtue. That doesn't mean that they are not outstanding people. Many people in society are willing to do things that they know are immoral in exchange for a large sum of money. It doesn't necessarily make them a bad person.
Yes, it does.