that's right, usually the most affected is our family because they bear the brunt of the problem that they didn't make.
they do things to fix their lives and to become succesful but because of your vices and problems that you've created, they are also involved. This is one of the reasons why some families are broken, because they prefer to live without the person who brings them problems. It's hard to accept but many cases like this happen in real life.
And of course something like this will have big impact which is not good for family harmony, not all gamblers can think like this because they have been blinded by gambling which also affects their brain.
The mindset of gambling addict has changed and is very different from normal people in general so that many of them don't really care about their families, but for some gamblers who already have a good understanding and mindset will know that they should not experience problems with addiction.
People who can think like that will keep gambling activities away from the family environment and they can avoid all the bad effects of gambling on all family members.
Indeed, cases like this have happened lot in the real life and of course this is very sad.