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.
So let not blame this on gambling, but its on him all the way.
100% agree with you he ruined it for himself he was not that addicted to gambling he was addicted to the greed that is associated with gambling. In my estimation he didn't care about his career he cared more for how much he would make from the proceeds of whatever illegal behavior he was involved in. I need us costing the career he would have had. There are other sports who are involved in things like this. It is only matter of time before they get caught.
That is it, the idea of people blaming things for their own actions is quite unacceptable at this time and is a further show of irresponsibility from them, because he should accept responsibility for his actions and not shift the blame to gambling.
He exhibited greed and committed an clear offense against his profession and as a professional NBA player he knows the rule and acted against it.