If you are a family man, and yet your focus is still on gambling, clearly it will create a huge problem especially if you lose all your hard-earned money which is supposedly intended to fund for family expenses. Irresponsible gamblers are mostly the cause of a broken family since they cannot prioritize their families anymore and leave them hungry almost all the time. With this case, China is right to ban gambling. However, gambling as a part of Chinese tradition, I think that should only be practiced occasionally when there are reasons to celebrate, but not that people should fall into gambling addiction.
Having a family and still continuing your gambling activities would only cause conflict and issues if you won't be able to manage it. Not all families has concerns for gambling related activity but you must always know your priority and know your limits when gambling as you are not only living for your own but rather for your love ones as well. Financial problem is one of the common issue between families as it's one of foundation to be able to survive but it is also why people relates gambling with this as more and more people gets addicted to gambling.
I think it will all depend on you, some people play gambling occasionally and their families knew that there's no bad thing about that. It will only matter if you are already addicted to it, if you know your limits and you put your family first before your hobby (gambling) then it is good. Emotional support from the family really can help us if we are getting addicted to something. If a family can no longer support someone with their addiction or it can't help so much, he needs to rehabilitate.