Straight forward answer this is not about gambling ruining his career.
I second this. This isn't about gambling destroying this man's career and life in general, at least if found guilty. This is about cheating. This is about his greed and lack of sound judgement. This is about violating his contract.
Gambling isn't the problem here. It's just used as a convenient way for this man to cheat. He probably believed he can use his limited power and influence to make more money. If found to be true, it isn't gambling that destroys him; it's his insatiable greed.