The facts do not support the premise, of course. David Price is the most recent example of a player who is not only African-American, but had some prior issues with the Red Sox, David Ortiz at least, and wasn't exactly a favorite of Boston fans.
But $217 million persuaded him to play in Boston for 7 years.
He also declined an opportunity to opt out. And yes, I realize that decision was influenced by the fact that he wouldn't have gotten as much on the market. But that's the whole point. The money was enough to keep him in Boston.
Price is not all about the money, either, as he proved by opting out of the 2020 season because of COVID concerns.