I dont see gambling as a direct reason for divorce. I believe that it should be a collection of problems and moments for one person to take a decision to divorce. Divorce just because a person is gambling, then there were no true love between people. If relationship are based only on the money, that is so wrong. Divorce if a person loses too much, and marry because a person has won a lot. That is so low.
There's a limit on what a human can take when talking about stress. When it's too much, they will break down and will decide without thinking. Anger. If the gambler doesn't change, he is the one who is not in love anymore, not the one deciding to leave him.
When some one cross his limitation, the situation is no longer normal. At that time, there is no way to take any decision. If the gambler is addicted and does not care about the family, then it is natural to want to end this situation. At some point, the patience between the husband and wife is definitely lost. Due to which they try to break up their relationship. Although many times it is seen that no one can take the decision normally. When one becomes angry such acts are committed.