There's a popular remark among gamblers in the part of my country I reside. The saying is expressed like this "if you quit that's when you lose".
Maybe I also often read and hear a similar saying, which reads:
"It's not shameful to lose to gambling, it's shameful to give up gambling."
But the statement was broken by other words of wisdom.
That is:
“In the casino, the rule of thumb is to keep them playing and to keep them coming back. The longer they played, the more they lost, and in the end, we got it all." casino.
My understanding for your statement (
"if you quit that's when you lose"). That is a person's repentance and identity, they realize that the casino will get everything. 'stop gambling' is a choice to live a normal and healthy life, not vice versa to lose.