For me if this statement was to be true I would say there is a possibility of match fixing if these games they gamble on included the games they themselves play in otherwise this is up for debate until proven guilty. But looking at the charts i would honestly say these guys do not have any involvement in how government is currently run.
I've heard that there's this rule for esports players that they're setting for themselves to avoid gambling especially for their match and any of their teammates match.
I think the same for athletes, if they gamble, they should not be involve with that match so that there will be no connection if they win. It's complicated but if an athlete do gamble, it is their decision and habit not on us.