100%, had a lot of friends who destroyed their lives because of gambling addiction. Unfortunately, no matter how much help they tried to get, they still ended up in the same life.
An addicted gambler can't change what he used to if he is not helping himself and not willing to do so. It's not easy to overcome the addiction that's why it is crucial that the gambler itself is determine to stop this habit (aside from the help of others).
Family and relatives are indeed affected if one of the member ended up as an addicted. The humiliation and emotional trauma are there. The reason why we should not only think of ourselves when we gamble since we have a family that will be greatly affected when something happened to us.