True, but James doesn't rank very high on the likability scale. People would be far more likely to watch a hypothetical "Win James Holzhauer's Money" than they would a Jeopardy! hosted by him.
James was a dominant player, but we've seen dominant players before. The main reason for James' accomplishments was simple: his chosen profession involves risking his own money that he already has. When it comes to risking money someone else is giving him, he had no problem being reckless AF because when you are a pro gambler and the worst-case scenario is leaving a game with the same amount of money you had coming into it, you can't lose.