Straight forward answer this is not about gambling ruining his career.
This is a pour case of greed and for sure double dipping is a big offense, it means you cheating everyone at your own table, players are meant to stay off from such actions.
Sometimes I feel this is the right punishment to all those with greed and mostly there's a priveledge to stop in time when the feeling of greed comes in but they being adamant and nonchalant is what makes it seems more like stupidity. When you know deep down you can't control oneself from such acts it's better to stay off gambling but the reverse is the case and they guy is to be held responsible not the gambling.