Addiction is bad and that means you are doing things too much and that could affect your life. In gambling, too much exposure can lead you to addiction and that could ruin your life so technically its wrong but there are certain point where we experience a downturn in our lives and make mistakes, the real big challenge is how you will push yourself to bounce back and make things right.
Addiction in times of gambling is totally wrong because I have never witness anyone that look responsible while addicted to gambling, so addicted to gambling only make someone life useless because all they could do any time they have money is just to gamble, they consider it first be for any other things, deceiving themselves that they will make huge amounts after gambling and that is how the end up losing everything, the addiction makes them forgetting their responsibilities, I think this is the only thing that they failed to do that people hate as there behaviour. If not people will not care about them after all they know what they are doing.